You could take it easy a bit in the mornings. Give yourself an hour or so to get to work for 10 to 12 miles. Then if you wish, hammer it home in the evenings.

I've commuted off and on, usually less than 10 miles to work/school, and didn't worry about it that much for bike commuting. I only showered when I did run commuting.

Some people who feel they need special bike outfits or dress clothes figure out a way to change at work. Pit wash?