[folivier]

Today I noticed the microphor toilet not keeping water in the bowl. Poured a little veggie oil but that didn't do anything. Later noticed the gasket on the flapper looked like it was unseated in its groove. I shut off the water and was able to push it back in place and also poured some vinegar and let it sit for a few minutes then scrubbed the surface with a toothbrush to remove the calcium build-up. I also put a little vaseline on the gasket surface.
Just glad we caught it before we flushed the gasket down into the tank!