Showers make my feet look dirty!

I've always preferred baths to showers - you can sink into a bath. At my flat I used to, as a small nod to water saving, have a shower once or twice a week in summer. When I moved here I didn't have a shower so was able to enjoy my baths with a clear conscience. When I finally got round to having the bathroom done I had a shower installed in the bath and started with a shower and hairwash twice a week. Then I started to increase the number of showers and, unless very stiff or needing to use aromotherpy oils, I've got used to having a shower. Problem is my feet! When I have a bath I use a body scrub on my feet and ankles. When I have a shower I don't, and dry skin builds up on my feet and makes them look slightly grubby - embarrassing when my yoga teacher comes to move them! I did try putting the body scrub on my feet before my shower, but it makes my feet liable to slip and I daren't risk it again. One bath a week with attention to my feet is not enough, so having got used to showers I am going to have to up the number of baths!