Toto Dalton toilet review, the best toilet for under $200?

If you have the old style fill valve with the ball on a rod, then you can take the fill valve apart and clean.
There is a small locking pin that drops in from the top, remove that and I think you can spin off the top part of the valve.

Opposing point of view

I know that Terry and many others like the Dalton as a lower-cost alternative to the Drake, but go to "Toto Dalton Toilet" thread to read a couple of opposing views, related to "piss-poor" bowl wash in the Dalton.
https://terrylove.com/forums/showthread.php?37810-Toto-Dalton-Toilet&highlight=dalton

Perhaps if SaniGloss was available on the Dalton - I don't recall that it was - it would make a world of difference for this deficiency.