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For some reason MWF is better with hard water than soft water.
It does seem to need a good bit of water (warm not hot), but I have never had an issue getting it to lather.
Member: OGA - SSB - BOTOC - TOFLAC-U - LOSER
I use cold water on my puck of MWF, it is a thirsty soap but doesn't seem to care if it is cold, warm or hot. YMMV
Jay - LOSER, Cult of Arko, The CHOSEN, TOFLAC-U