Rake remaining chunks of caulk from the joint using the hook end of a painter s five in one tool or a sharp putty knife. To remove old caulk soften it first so it s easier to remove.
The final preparation step is to clean the surface and remove mildew.
How to remove old caulk. Next use the blade of a putty knife to separate the caulk from the wall or tile. Then pull up any remaining bits of caulk with pliers or use a toothbrush to brush away small pieces. Next pull out as much caulk by hand as you can and scrape away any remaining caulk using a glass scraper.
You can apply a commercial caulk remover or soak the caulk with water saturated rags for 72 hours. Once the caulk has softened use a small razor blade to slice through it and create exposed edges making it easier to remove. To remove old caulk start by holding a utility knife parallel to the surrounding surface and slicing into the caulk along the edge to weaken the bond.