Originally Posted by Goal15
this is a long shot but I recently pulled, toilet to replace valve and inside underside of toilet was disgusting I didn't stick my nose in it to see if it smelled but out could be your culprit
It was the seal, I removed the toilet, and the donut seal was almost gone....
But, on the bright side, after all that bleach in the tank, there was NO smell, or should I say, only the smell of bleach....
I also poured some olive oil into both tanks, and it did make opening and closing the valves easier!