You could also help the problem from the inside (assuming you don't have oily skin somewhere else on your body like your face) by taking flax oil and/or fish oil caps. Three to four caps a day (two in am, two in pm) will make a huge difference if you have dry skin.

This is how I survived my stint on Accutane when my skin became unbearably dry. I've also been encouraging my husband to take them twice a day in the winter since then because he's got very dry skin and it really helps him.