Remove Caulk From Bathtub

Removing Old Caulk Moldy caulk tends to lose its grip on the bathtub and the wall behind it, so start by slicing into a section with the knife, gripping one of the ends with pliers and pulling. You may get lucky and be able to remove most of it that way, but it's more likely you'll have to cut and scrape, using the knife and putty knife. Allow to completely air dry (again, patience) before applying new caulk. TIP: If you're planning to re-caulk a tiled shower or bathtub wall, deep clean the tile before you remove the old caulk.

How To Remove Caulk From Tub (Diy) Family Handyman