We bought a Kohler toilet (I think the model was K-3423 Wellworth)
about 2 years ago, everything works fine until recently. The "washer"
(or the floating thingy) seems to need some lubricate and because it
won't fully float up to the point that it suppose to be, so the water
will just keep on flushing the bowl... is there any easy way to fix
this, or do I really have to replace the parts of the "washer" or
something like that?? thanks!