Warning: Tried a new contact cleaner on some old cannon plugs and it went weird

I was working on a 737's comm panel last month and grabbed this new brand of contact cleaner, 'AeroClean Pro', from the supply truck. Sprayed it on some crusty 20-pin cannon plugs like normal, but instead of drying clear, it left this white, powdery film all over the pins. Had to go back and scrub every single pin with a fiberglass brush, which added like an extra hour to the job. The can says it's safe for avionics, but I'm not buying it again. Has anyone else had a cleaner react like that, or is there a brand you trust for old connectors?

2 comments

2 Comments

averywilliams5h ago

Check the MSDS sheet for that AeroClean Pro, some formulas have a carrier that evaporates and leaves residue in humid conditions.

grant_allen853h ago

I've actually used the AeroClean Pro in high humidity areas for months. The residue thing might be from older batches, but my recent cans leave a clear finish even in my basement workshop. I check for streaking on glass and haven't seen it. Their formula update last year really fixed that issue for me.