diff --git a/services/experimentAnalysis.ts b/services/experimentAnalysis.ts
index cf51c5a..1f5d278 100644
--- a/services/experimentAnalysis.ts
+++ b/services/experimentAnalysis.ts
@@ -58,7 +58,7 @@ function aggregateWeeklyMetrics(
   const weeklyMap = new Map<string, WeeklyMetrics>();
 
   for (const r of salesData) {
-    const asin = (r.asin || '').toUpperCase();
+    const asin = (r.asin || '').trim().toUpperCase();
     if (!asinSet.has(asin)) continue;
 
     const mkt = (r.marketplace || (r as any).customer || '').toLowerCase();