Don't be fooled - he is very hard, since four body impacts will kill you.
I found that a good way to fight him, since you need Glue shot for the U letter, is to fight him after Nail Man. Put up the Nail Shield, and quickly dodge the Glue Shot he fires, then jump on one of the steps and jump over him as he slides by. Don't try to inflict multiple hits, just concentrate on dodging Glue Shot and jumping him. Hopefully you brought a W tank or 2.
By the way, MPX, if his move of sticking to the overhead is a reference to the old Krazy Glue commercials, it was very clever.