diff --git a/packages/components/src/components/SquiggleChart.tsx b/packages/components/src/components/SquiggleChart.tsx
index 91e1a7b8..c48696bb 100644
--- a/packages/components/src/components/SquiggleChart.tsx
+++ b/packages/components/src/components/SquiggleChart.tsx
@@ -56,7 +56,7 @@ export interface SquiggleChartProps {
   enableLocalSettings?: boolean;
   /** The project that this execution is part of */
   project?: SqProject;
-  /** The name of the squiggle execution source. Defaults to "main" */
+  /** The name of the squiggle execution source. Generates a UUID if not given */
   sourceName?: string;
   /** The sources that this execution continues */
   includes?: string[];
diff --git a/packages/components/src/lib/hooks/useSquiggle.ts b/packages/components/src/lib/hooks/useSquiggle.ts
index 085bc6f9..9878206e 100644
--- a/packages/components/src/lib/hooks/useSquiggle.ts
+++ b/packages/components/src/lib/hooks/useSquiggle.ts
@@ -69,11 +69,13 @@ export const useSquiggle = (args: SquiggleArgs) => {
 
   useEffect(() => {
     return () => {
-      if (!args.sourceName) args.project.clean(result.sourceName);
+      if (result.needsClean) args.project.clean(result.sourceName);
       if (args.project.getSource(importSourceName(result.sourceName)))
         args.project.clean(result.sourceName);
     };
-  });
+  }, 
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  []);
 
   return result;
 };