Our two year old pat trap started to throw a lot of illegal right hand birds. Then it started to break a lot of birds. After our home trap mechanic discovered that the elevator was not always coming up for the birds. The cause was not the timing but the crud built up on the elevator that was binding it. After scraping broken pieces of clays from the slots the elevator passes through and spraying WD40 on the sides of the elevator the machine now works like new. Question what preventive maintenance should be done to prevent this from happening again? Afraid the wrong kind of lube would cause more problems then it is worth by collecting dust from the clays and binding the elevator. The freezing cold weather probably did not help us any. Anyone run into this?