How to fix a noisy Toto toilet the right way

Remember when I fixed my noisy toilet? I was so pleased with myself for having jiggled the toilet into submission.

Sadly, it began making noise again last week. I had to wait until Gary was out of the house before I could get my hands into the tank and begin jiggling again.

I was poking and jiggling and suddenly noticed one of the bits I was jiggling had a slot designed for a screwdriver.

Yep. I tightened it, still had the problem, loosened it, problem went away. I feel quite foolish.

Than again, maybe the Toto just wants some attention. Maybe it just wanted my hands in there jiggling its bits.