After applying a bead of caulk around the top of my tub ... and then smoothing the surface of the bead [caulk] with the tip of my finger ... there always seems to be some additional cleanup necessary.
This cleanup can be frustrating at times and I wonder if you have suggestions to make that job easier. What about waiting for the caulk to dry and set up .... and then trimming up the excess with a razor?
One reason the pros make it seem so easy is that they do it often. They know how much to squeeze out of the tube or gun before they attempt to smooth it. I like to start with a little less of a bead of caulk than I think I need. Then I use a spoon dipped in water to smooth it. If you keep the spoon at the same angle, the bead will be consistant all the way around the surface. Try squeezing about a 2" bead out and smooth it. If it is too much, reduce the amount and try again.
If you have never made a mistake, you haven't done much.