diff --git a/src/lib/streamCache.svelte.ts b/src/lib/streamCache.svelte.ts
index 83878c2..6c4af5a 100644
--- a/src/lib/streamCache.svelte.ts
+++ b/src/lib/streamCache.svelte.ts
@@ -145,12 +145,14 @@ async function assemble(streamId: string, total: number) {
     // check at each step the chunk names (ranges) are coherent
     let written = 0;
     while (written < total) {
-        const part = await dir.getFileHandle(String(written)).catch(() => null);
+        const name = String(written);
+        const part = await dir.getFileHandle(name).catch(() => null);
         if (!part) break;
         const file = await part.getFile();
         if (!file.size) break;
         await writable.write(file);
         written += file.size;
+        await dir.removeEntry(name).catch(() => {});
     }
     await writable.close();