Cleaning a Thetford Toilet Water Tank

BikingBob
BikingBob Forum Participant Posts: 14
edited July 2013 in Caravan & Motorhome Chat #1

Does anyone have any suggestions for removing the black slime which periodically collects on the sides of the Thetford loo flushing tank in my caravan, please? It tends to turn the water black and makes a mess of the bowl when flushed.

Many thanks