I rinse the head off when its too covered in shave cream. It takes a lot to clog up the head with hair (assuming you shave regularly anyway), I rarely find a need to rinse the for that. And as long as you follow the no extra pressure rule there are no issues with the jaw line and chin. The blade isn't as exposed as you might be thinking. Take a look at some pictures of safety razors on google and you'll see what I mean.
12/28/13 at 8:22pm