Do you have a burnisher for a TT patchbay for sale? How often should you use one?
I do not own one sir. You should never use one. Burnishing tools cause extreme jack spring wear which may cause intermittent signals.
Below is how to clean your patchbay jacks:
Take a clean patch cable, insert and withdraw into your patchbay jack four or five times. This causes a mechanical wiping action that cleans both springs that make contact with the plug and switching contacts. Then clean your patch cable plug with a moist cloth and repeat on the next channel.