More of a practical question here.
I've had clicky keys (on the French horn) for a while now and I plan to get them fixed soon. But does anyone know a temporary fix to the problem? I can't seem to find the root of the noise, and I've tried almost everything. From oiling to re-screwing bolts (though not too intensely because I didn't want to damage the horn further) but to no avail. Any suggestions would be appreciated!
Edit: It makes a sound when the 1st key is both pressed and released.