Silicone caulk around base of shower door track
When we bought this house about 17 years ago, there were clear silicone beads of caulk on each side of the track base and we had a new shower door (with new track) who also put down a nice bead of silicone on each side. Now, after years of use, the caulk on the bathtub side of the track base has a lot of mildew in it. How do I cut away the old silicone without cutting the fiberglass tub portion under the silicon? Is there a special tool for this?
Thanks in advance,