I am not saying this is a good idea, but I have done it before under emergency conditions. I fill the kitchen sink with about 8" of very hot water, with a lot of liquid dish soap added while filling the water. I just sort of bang it on the bottom of the sink and rotate it, then run very hot water from the inside to the outside to rinse it, & air dry.
I was afraid of scrubbing it for fear that it would open up some of the pores unintentionally.
Good Luck