Mine also. Flex fire seems to be okay thoughFlex ice is an acid, but my machine doesn’t do that with liquid acid rinse. Only flex
Flex Ice?
When we use Flex ice it causes that for some reason?
Nope, I have used flex ice since my machine was new and I get the same white grit plugging up filters. If I switch to liquid then no pluggingit's descaling/dislodging scale present in your TM
..L.T.A.