Resealing the shower door will most often fix a leaky situation and leave you with a dry bathroom. While shower doors add a linear and defined look to your bathroom, over time leaks can develop in the door seals. Some obvious signs of a leaky shower are wet carpeting or flooring after showering, damage to wood trim or floor bases or damage to wall coverings. Some common reasons for problems are settling of your home, loose or cracked tiles, cracks where the floor meets the tile and faulty grout. The most common problem is the seal around the shower doors.
Clean the area around the shower door. Remove all caulking residue until you have a clean smooth surface. Use a nonabrasive cleaning solution so you don't accidentally scratch your tub or shower fixture.
Apply the caulk. Run a thin line of silicone along the outside of the shower door track by squeezing the trigger of the caulk gun to dispense the silicone. Immediately smooth the silicone with a caulk finishing tool to create a smooth line around your framing.