Every Good magician in electronics , hides some special Chemicals under the hood
In Greece the most know line of such spray products, are the made by Philips ones.
Degreaser Cleaner with oil - with out .
Freezing ones .
Relay contacts cleaners.
etc etc ..
Name your own selection for its task ..
Brand + code
Copy paste if it helps .
Fader - Degreaser Cleaner with oil............
Fader - Degreaser Cleaner with out oil.......
Freezing spray ......................................
Relay contacts cleaners..........................
Other useful to you .............................