You should be using extender tips on your CA bottles. I use the hard tip that is about 3" long for my medium CA and I use the teflon micro tubeing (about 3" sticking out of the bottle) for the thin CA. Keep a small container of acetone WITH A LID nearby. As the tip for the medium CA gets clogged, take it off and put it in the acetone overnite, It will come out good as new. As the the micro tubing on the thin CA gets clogged, just cut off about 1/4" of the end.

Using the extender tips, very precise placement of the CA can be done without dripping it all over everything.