Sorry to necro this thread, but PLEASE don't use wood glue. I have done it (Titebond II), and it does work, but it also has the risk of leaving small chunks in the run-out groove that are difficult to remove. There are better, less risky mask cleaning methods, but they're all messy, annoying, take a long time, and only remove click-causing contaminants (ie: doesn't help much with mold release compounds).
A vacuum-based solution is the best bang for the buck, and an excellent investment. If you have the DIY itch, the homebrew examples here are excellent. If you're not that daring, look into either the KAB EV-1 ($169 + vacuum) or Record Doctor ($200 vacuum included) if finances are really tight, or something nicer and easier to use like a Nitty Gritty, VPI HW16.5, Okki Nokki, Consonance Opera, or any other similar device for between $400 and $650. Higher prices generally just mean more time-saving convenience features. Wet clean and vacuum is first and foremost, though. Even if you get really crazy and homebrew an Ultrasonic cleaner (like I did, it does improve things), you'll still need the vacuum cleaning.
So please do not use wood glue. There are so many better options out there.