When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Getting the old ones out is harder than getting the new ones in I think. I gently pried the old ones up with a molding lifter. Than like these guys all said, I think soap and water works the best. They'll just pop right in there.