You can also try a tip a lot of us learned from Rick Fielding, especially great on 12's but works well on 6 string too.......On the bass E and also, depending on gauge, on the A....Cut a small v-shaped groove in the rubber. Makes a big difference.

You might also enter "capo" in the filter box and set the refresh to the max and you'll find several excellent capo threads from the past.

Spaw