diff --git a/README.md b/README.md
index 0ae655f..22b5f60 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Overview
 
-Takes functionality from our [public website calculator](https://www.rewiringamerica.org/app/ira-calculator) and packages it up in a custom web component built using `lit`. Lit's `Task` library takes care of watching the form parameters for changes
+Takes functionality from our [public website calculator](https://www.rewiringamerica.org/app/ira-calculator) and packages it up in a custom web component built using `lit`. Lit’s `Task` library takes care of watching the form parameters for changes
 and fetching data from our API.
 
 **Note:** API keys are required, sign up on our [API homepage](https://www.rewiringamerica.org/api).
@@ -26,7 +26,7 @@ and fetching data from our API.
 
 For better or worse, using BEM to keep CSS manageable. This may be overkill since LitElement encapsulates the styles for us already.
 
-The CSS font-face does not seem to apply if fonts are loaded by the Shadow DOM's styles, so a separate font stylesheet is provided for these.
+The CSS font-face does not seem to apply if fonts are loaded by the Shadow DOM’s styles, so a separate font stylesheet is provided for these.
 
 # Hosting
 
@@ -41,8 +41,8 @@ Features and content:
 - [ ] Switch order of incentives depending on whether credits/rebates are more useful.
 - [x] Add currency formatting to the income input element. Using [autonumeric](http://autonumeric.org), which is large.
 - [ ] Consider [Inputmask](https://robinherbots.github.io/Inputmask/#/documentation/numeric) in future.
-- [x] Use a better tooltip component to ensure tooltips are readable at mobile breakpoints. Trying Shoelace's [tooltip](https://shoelace.style/components/tooltip).
-- [ ] Think about how the 'back to calculator' links should work on RA's detail pages ([example](https://www.rewiringamerica.org/app/ira-calculator/information/electrical-panel))
+- [x] Use a better tooltip component to ensure tooltips are readable at mobile breakpoints. Trying Shoelace’s [tooltip](https://shoelace.style/components/tooltip).
+- [ ] Think about how the 'back to calculator' links should work on RA’s detail pages ([example](https://www.rewiringamerica.org/app/ira-calculator/information/electrical-panel))
 - [ ] Add analytics support (Amplitude events?)
 - [ ] Add support for Spanish translations.
 - [ ] Send javascript events for calculate, results, project details clicks.
@@ -50,7 +50,7 @@ Features and content:
 Robustness:
 
 - [x] Take a copy of fonts and serve them from this domain.
-- [ ] Port to API v1's calculator endpoint.
+- [ ] Port to API v1’s calculator endpoint.
 - [ ] Add slots to allow customizing the form intro text.
 - [x] Add UI tests with Cypress, run in CI.
 - [ ] Add unit tests, run in CI.
@@ -63,7 +63,7 @@ Optimizations:
 
 - [ ] Add support for caching results in localStorage.
 - [ ] Add support for showing default list of incentives (from `/api/v0/incentives`).
-- [ ] Reuse microcopy from Rewiring America's CMS to avoid duplication between this repo and our website.
+- [ ] Reuse microcopy from Rewiring America’s CMS to avoid duplication between this repo and our website.
 
 Roadmap:
 
@@ -74,7 +74,7 @@ Roadmap:
 
 Bugs:
 
-- [ ] Clicking the tooltip for Household Income should focus the input. Do we need `delegatesFocus` or do we need to refactor the input into a slot so it's light DOM?
+- [ ] Clicking the tooltip for Household Income should focus the input. Do we need `delegatesFocus` or do we need to refactor the input into a slot so it’s light DOM?
 - [ ] Tapping the tooltip on mobile probably shouldn't select the field. Move outside the label maybe?
 
 # References
diff --git a/src/api/fetch.ts b/src/api/fetch.ts
index ecc52df..927f64e 100644
--- a/src/api/fetch.ts
+++ b/src/api/fetch.ts
@@ -19,16 +19,16 @@ export async function fetchApi<R>(
   });
   if (response.status >= 400) {
     console.error(response);
-    // statusText isn't always set, but it's a reasonable proxy for a human readable error if it is:
+    // statusText isn't always set, but it’s a reasonable proxy for a human readable error if it is:
     let message = response.statusText;
     try {
       const error = await response.json();
       console.error(error);
       if (error.title && error.detail) {
-        // Zuplo's API key errors have this form:
+        // Zuplo’s API key errors have this form:
         message = `${error.title}: ${error.detail}`;
       } else if (error.message && error.error) {
-        // Rewiring America's API errors have this form:
+        // Rewiring America’s API errors have this form:
         message = `${error.error}: ${error.message}`;
       }
     } catch (e) {
diff --git a/src/calculator-form.ts b/src/calculator-form.ts
index dd2ed0e..5c1f09b 100644
--- a/src/calculator-form.ts
+++ b/src/calculator-form.ts
@@ -97,9 +97,9 @@ export const formTemplate = (
   const projectField = showProjectField
     ? html`<div>
         <label for="project">
-          Project you're most interested in
+          Project you’re most interested in
           <sl-tooltip
-            content="Select the project you're most interested in."
+            content="Select the project you’re most interested in."
             hoist
             >${questionIcon(tooltipSize, tooltipSize)}</sl-tooltip
           >
@@ -167,7 +167,7 @@ export const formTemplate = (
           <label for="household_income">
             Household income
             <sl-tooltip
-              content="Enter your gross income (income before taxes). Include wages and salary plus other forms of income, including pensions, interest, dividends, and rental income. If you are married and file jointly, include your spouse's income"
+              content="Enter your gross income (income before taxes). Include wages and salary plus other forms of income, including pensions, interest, dividends, and rental income. If you are married and file jointly, include your spouse’s income."
               hoist
               >${questionIcon(tooltipSize, tooltipSize)}</sl-tooltip
             >
diff --git a/src/calculator.ts b/src/calculator.ts
index d9ac9d9..49f7b3e 100644
--- a/src/calculator.ts
+++ b/src/calculator.ts
@@ -106,7 +106,7 @@ export class RewiringAmericaCalculator extends LitElement {
 
   private _task = new Task(this, {
     // this array of parameters is generated by the `args` function below
-    // it's formatted with snake_case to make it really easy to throw into URLSearchParams
+    // it’s formatted with snake_case to make it really easy to throw into URLSearchParams
     task: async ([
       zip,
       owner_status,
diff --git a/src/index.html b/src/index.html
index d2267eb..a9ab53a 100644
--- a/src/index.html
+++ b/src/index.html
@@ -66,7 +66,7 @@ <h1>Rewiring America Embeddable IRA Calculator</h1>
         This page is a demonstration of our embeddable calculator, intended for
         website owners to add to their own page to help their visitors
         understand the electrification incentives offered as part of the
-        Inflation Reduction Act (IRA). If you're looking to evaluate the impact
+        Inflation Reduction Act (IRA). If you’re looking to evaluate the impact
         of IRA electrification incentives for your own home, please use
         <a href="https://www.rewiringamerica.org/app/ira-calculator"
           >our official IRA Calculator</a
diff --git a/src/state-calculator.ts b/src/state-calculator.ts
index ab4d6d8..f2d54ce 100644
--- a/src/state-calculator.ts
+++ b/src/state-calculator.ts
@@ -133,7 +133,7 @@ export class RewiringAmericaStateCalculator extends LitElement {
       this.zip !== prevZip ||
       this._utilitiesTask.status !== TaskStatus.COMPLETE
     ) {
-      // This will run _task when it's done.
+      // This will run _task when it’s done.
       this._utilitiesTask.run();
     } else {
       this._task.run();
@@ -179,7 +179,7 @@ export class RewiringAmericaStateCalculator extends LitElement {
       if (options.length === 0) {
         this.utility = '';
       } else {
-        // Preserve the previous utility selection if it's still available.
+        // Preserve the previous utility selection if it’s still available.
         // Select the first option in the list otherwise.
         if (!options.map(o => o.value).includes(this.utility)) {
           this.utility = options[0].value;
@@ -309,8 +309,8 @@ export class RewiringAmericaStateCalculator extends LitElement {
 }
 
 /**
- * Tell TypeScript that the HTML tag's type signature corresponds to the
- * class's type signature.
+ * Tell TypeScript that the HTML tag’s type signature corresponds to the
+ * class’s type signature.
  */
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/src/state-incentive-details.ts b/src/state-incentive-details.ts
index 5b9bf03..64cbd26 100644
--- a/src/state-incentive-details.ts
+++ b/src/state-incentive-details.ts
@@ -364,7 +364,7 @@ const atAGlanceTemplate = (response: APIResponse) => {
         ${summaryBoxTemplate(
           'Upfront discounts',
           `$${response.savings.pos_rebate.toLocaleString()}`,
-          "Money saved on a project's upfront costs.",
+          "Money saved on a project’s upfront costs.",
         )}
         ${summaryBoxTemplate(
           'Rebates',
@@ -442,7 +442,7 @@ export const stateIncentivesTemplate = (
 
   return html` ${atAGlanceTemplate(response)}
   ${gridTemplate(
-    "Incentives you're interested in",
+    "Incentives you’re interested in",
     incentivesByProject[selectedProject] ?? [],
     [selectedProject],
     selectedProject,
diff --git a/src/utility-selector.ts b/src/utility-selector.ts
index 2f58bbd..ee98dc4 100644
--- a/src/utility-selector.ts
+++ b/src/utility-selector.ts
@@ -105,12 +105,12 @@ const utilityFormTemplate = (
 };
 
 /**
- * The state map + utility selector section. They're displayed side-by-side on
+ * The state map + utility selector section. They’re displayed side-by-side on
  * large and medium layouts, and map above selector on small.
  *
  * Because the utility selector is outside the main calculator form, changing
  * the selection should immediately reload incentives (as opposed to waiting for
- * a button press), so there's a callback for it here.
+ * a button press), so there’s a callback for it here.
  */
 export const utilitySelectorTemplate = (
   stateInfo: StateInfo,
diff --git a/src/working-copy.html b/src/working-copy.html
index 6673b7c..792d66c 100644
--- a/src/working-copy.html
+++ b/src/working-copy.html
@@ -66,7 +66,7 @@ <h1>Rewiring America Embeddable IRA Calculator</h1>
         This page is a demonstration of our embeddable calculator, intended for
         website owners to add to their own page to help their visitors
         understand the electrification incentives offered as part of the
-        Inflation Reduction Act (IRA). If you're looking to evaluate the impact
+        Inflation Reduction Act (IRA). If you’re looking to evaluate the impact
         of IRA electrification incentives for your own home, please use
         <a href="https://www.rewiringamerica.org/app/ira-calculator"
           >our official IRA Calculator</a