I shower in the am before riding 12 miles then when I get to work I take off my cycling clothes asap and let the air start doing its job. I will towel off a bit if needed. The biggest issue that I had to figure out is that you do not stop sweating as soon as your ride is finished.
But when it really comes down to it, I just do a little whore bath (some deodorant, a lil patchouli and maybe a bit of powder)cause I dont really care!