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What am I doing wrong? I have my soap in a mug and add a little water. I whisk around for a bit and then apply, but it's always very thin. Am I adding too little water? Am I not whisking around enough?
Try letting the warm water sit on the soap for at least 5 minutes. Depending on water hardness, you may have to whisk the lather up for a bit longer to get a nice thick lather.
Try making a super-lather and see if that helps.