Due to high humidity levels, mold can sneakily build up in bathroom corners and crevices. Porous surfaces in the shower, such as grout and caulking, are especially vulnerable to mold and mildew growth ...

Pull it out and recaulk. It's easier and quicker than cleaning, and probably past time anyway if it's yellowed.<BR><BR>Edit: I replied before you added the comment that you didn't want to remove it.

Silicone sealant is a form of adhesive used to create a water- and airtight seal at the joint between two surfaces, and they ...