There are many places on a home where caulking has been used. Since caulking is regular homeowner maintenance, make sure to check for your at least twice a year for areas that need caulk touch ups or to be re-caulked. This will help to ensure that your home is looking great always. A key sign in determining if caulk needs to be replaced and/ or touched up is drying and cracking. When you need to address the caulk, it is always best to visit your local hardware store to determine which caulking is best suited for your project - since the type of caulking to use will depend on the surface it is being used on.