I make a small "dam" out of heavy paper- cereal box etc to fit inside the slot funnel and cover it with scotch tape. The glue will not stick to the tape. The dam must fit tightly against the the area where the hole is so you may need to double up the paper or wedge something behind it. Don't try to fill the hole in one application,build it up in thin layers until it is above the surface of the stem and then work it back down feathering it to blend it in.I must be doing something wrong. The CA glue is seeping up the pipe cleaner. I better review the write ups again...