Thursday''s Ask the Experts question from a cleaning professional on the International Custodial Advisors Network (ICAN) "Ask the Experts" page: The facility has two toilets that develop recurring streaks very shortly after the toilets are cleaned. It looks like the toilets were not cleaned when the client''s employees arrive in the morning.
Sometimes the streaks reappear even before the crew leaves the building. Any ideas what it might be the cause of the stains and how to eliminate them?
This sounds as if you have a plumbing problem. It could be a leaking valve that lets the water constantly trickle into the bowl or the toilet flush water contains rust (from pipes) or minerals that leave visible streaks in the bowls.
Some newer buildings use recycled water in their toilets, which isn''t as particulate free as fresh water.
If the toilets have tanks holding the flush water, clean the inside of the tanks.
Check for leaking flush valves that let water ... — Lynn E. Krafft
, ICAN/ATEX editor