I use Lake Country pads. They are far to expensive to use just once (for me anyway); so there is a cleaning process involved. First of all I keep pads in ziplock bags that are labeled with the type of wax or polish I used on them... I don't mix polishes or waxes on the same pad... (anal, I know).
But to clean them I use Dawn dish soap and a lot of water to get the old wax out. LEt them dry real well and toss them back into the ziplock bag. Others on autopia.org talk about using alcohol -- but I've never heard of using kerosene on my buffing pads -- you could possibly damage the velcro backing.
One other idea is to take a look at the pad cleaning tool and solution available on this page:
http://www.superiorcarcare.net/lake-...foam-pads.html
Hope this helps...