diff --git a/src/mwfin/functions.py b/src/mwfin/functions.py
index 4d1a041..3fce33e 100644
--- a/src/mwfin/functions.py
+++ b/src/mwfin/functions.py
@@ -1,13 +1,14 @@
 import logging
 import asyncio
 from typing import Union, List, Dict
+from datetime import datetime
 
 from aiohttp.client import ClientSession
 from bs4 import BeautifulSoup
 from bs4.element import Tag
 from webutils import in_async_session, gather_in_batches
 
-from .constants import (HTML_PARSER, BASE_URL, END_DATE, BS, IS, CF, FIN_STMT_URL_SUFFIX, FIN_STMT_ITEMS,
+from .constants import (DEV_MODE, HTML_PARSER, BASE_URL, END_DATE, BS, IS, CF, FIN_STMT_URL_SUFFIX, FIN_STMT_ITEMS,
                         DEFAULT_CONCURRENT_BATCH_SIZE)
 from .exceptions import UnknownFinancialStatementItem
 
@@ -56,13 +57,16 @@ def find_relevant_table_rows(soup: BeautifulSoup) -> List[Tag]:
     """
     Returns the table rows containing the data of interest.
     """
+    now = datetime.utcnow()
     trs = []
     for tr in soup.find('div', attrs={'class': 'financials'}).tbody.find_all('tr'):
         try:
             if is_relevant_table_row(tr):
                 trs.append(tr)
         except UnknownFinancialStatementItem:
-            pass
+            if DEV_MODE:
+                with open(f'mwfin_unknown_items_{now.strftime("%Y-%m-%d_%H-%M-%S")}.html', 'w') as f:
+                    f.write(str(soup))
     return trs