Regular job at the local Uni is changing fluorescent tubes & starters. I've noticed that the fittings without covers tend to have more failed tubes than those with covers & I wondering if it could be gunk/muck/crap on the actual fitting. Changing the tube & starters doesn't always work.
Rather than waste tubes I'd like to try cleaning the contacts to see if that improves matters.
So, would a spray on electrical de greaser like this be best