In this video tutorial, viewers learn how to replace caulk on a bathtub. Begin by placing a fresh blade into a utility knife. Then use the knife to cut out the old caulk. You want to make 2 cuts. The first cut with the knife plying flat on the edge of the tub. The second cut with the knife tip up at about a 45 degree angle. This will allow most of the caulk to come out in one piece. For any remaining caulk, take a razor blade and scrape it off. To remove any remaining mildew, apply 6 ounces of bleach to some water and apply it to the area. This video will benefit those viewers who have a caulk in their bathroom, and would like to learn how to remove it to make their bathroom more attractive.