I just got a pristine KWM-2 that works great but the contacts on most of the controls are dirty. The Exciter Tuning is touchy. Is it safe to spray the slugs with DeOxit or just use caned air? I think all the other controls can take the DeOxit. If not, please alert me. I think the $500 with a PM2 was fair. Thanks Dave VE4PN Sent from my iPhone