Here is a solution, teflon tubing.

The one on the right is thin CA, which was cloged so I cut the tip and inserted 1/8" of teflon tubing and attached it to the bottle with masking tape also used the same on medium and thick CA works great. For the thin one I had 1/16" teflon tubing attach to the 1/8" which also worked great in controling the flow of thin CA much more better than the original tip since it has 1/32" ID.

Now since I am graduate Chem. Eng. student working in lab I don't have problem accessing teflon tubing and tested this, it worked great. You can obtain Teflon tubing from McMaster.

http://www.mcmaster.com

go to page 94 of their online catlog and you will see that 1/8th is $0.58/ft but the min size is 10ft roll. If you use 3 inch per CA bottle you can have 40 CA bottle tips for $5.80 +s/h.

Get your buddies because with 40 CA bottles you can build lots of planes.

No CA will stick to Teflon plus you will have access to hard to reach areas and will have a great control of the CA you hold it down and if you don't sequese it won't flow.

Use masking tape to seal the tip after use. highly recommend 1/16th for thin CA.

If you see anything sticking to the tip you can cut it, I have been using it for 3 months and I did not need to cut any yet.