-- Make sure you're using edge banding properly sized for your panel. If the edge banding is significantly oversized, you'll be trimming a lot of excess glue on the backside of the excess edge banding.
-- Try reducing the amount of glue being dispensed. I've found that particle board, MDF, and various veneer-core plywoods each require different amounts of glue to be applied.
-- In my experience, the MFK 700/B is really best suited for processing the thicker PVC edge banding with the various radius cutters. These do sometimes load with glue. For solid wood edge banding, I prefer using the "standard" MFK with the 1.5 degree horizontal base with the 491666 cutter. In my experience, this setup has fewer issues with glue residue.
-- I usually trim the edge banding using a "climbing" cut, which seems to help with the glue issues.
-- In my experience, I generally still need to hit the trimmed edge with the carbide scraper tool, and sometimes a quick swipe with a hand sanding block.
The Conturo is definitely not going to produce the same edge as a $100k+ stationary machine, but for a small, one-person shop I find it worthwhile. It's funny, I'll sometimes go for close to a year between uses, and will periodically look at it (and the pile of accessories) and start calculating what I think I could get for it on Craigslist, but every time I do use it I'm reminded of how handy it is. It's not integral to my business, but when I do need to edge band something (usually an extension jamb for a egress window) it allows me to fabricate the parts quickly and move on with my life. It sure beats using an iron....