Didn't know the thing about hot water ruining the lather. I get a good lather; but, maybe I'll try taking the water temp down a notch. Also to the OP, try a little bit more water when you're lathering, it seems that MWF needs just the right amount of water; not too much, not too little!
It's only a few soaps that warm or luke warm water is best. I think harder soaps, especially lanolin has issues with hot water. YMMV.