Problem with Kohler single-unit toilet:
The cut-off lever at the top of the flushing mechanism sticks. The float
doesn't force it up even when the float is completely covered with water. I
have to lift the lever with my finger.
I can't seem to get the blue cap off to make an adjustment.
I tried spraying WD-40 on the lever, and it didn't help.
Then I tried liquid dish detergent to make it slippery. That seemed to help
for a while, but it had the unfortunate side effect of dissolving the rubber
Here is a website which shows a photo of the problem:
Any help most welcome: