diff --git a/tig-benchmarker/slave.py b/tig-benchmarker/slave.py
index 2a04787..b1e88c1 100644
--- a/tig-benchmarker/slave.py
+++ b/tig-benchmarker/slave.py
@@ -123,9 +123,11 @@ def send_results(session, master_ip, master_port, tig_worker_path, download_wasm
         resp = session.post(submit_url, json=result)
         if resp.status_code == 200:
             FINISHED_BATCH_IDS[batch_id] = now()
+            purge_folders(output_path, 0)
             logger.info(f"successfully posted root for batch {batch_id}")
         elif resp.status_code == 408: # took too long 
             FINISHED_BATCH_IDS[batch_id] = now()
+            purge_folders(output_path, 0)
             logger.error(f"status {resp.status_code} when posting root for batch {batch_id} to master: {resp.text}")
         else:
             logger.error(f"status {resp.status_code} when posting root for batch {batch_id} to master: {resp.text}")
@@ -163,9 +165,11 @@ def send_results(session, master_ip, master_port, tig_worker_path, download_wasm
         resp = session.post(submit_url, json=payload)
         if resp.status_code == 200:
             FINISHED_BATCH_IDS[batch_id] = now()
+            purge_folders(output_path, 0)
             logger.info(f"successfully posted proofs for batch {batch_id}")
         elif resp.status_code == 408: # took too long 
             FINISHED_BATCH_IDS[batch_id] = now()
+            purge_folders(output_path, 0)
             logger.error(f"status {resp.status_code} when posting proofs for batch {batch_id} to master: {resp.text}")
         else:
             logger.error(f"status {resp.status_code} when posting proofs for batch {batch_id} to master: {resp.text}")