I don’t know of any quality cream that will not lather in hard water.
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I usually travel with a DRH or TOBS cream. Cella also does very well when I travel with it, and the tub is nicely compact.
I don’t know of any quality cream that will not lather in hard water.
The calcium and magnesium in hard water precipitate fatty acids (the soap scum you get on the sink and razor), and that can reduce slickness. The cure is to use a little more soap or maybe add a drop or two of glycerine.
I have hard water. I have had excellent results with Spieck soap and all Haslingers soaps. In fact, I find these to be very similar products.
Reef Point Soaps and Barrister and Mann are two I have used that work extremely well in hard water.
La Toja shaving stick works well with hard water. It's in my travel bag.