Recently we received a complaint from one of our customers who wanted to know if we would replace his cover due to the warping that had occurred.on our PrintDry filament dryer. 
He initially sent me this photo showing major warping to the strongest part of our filament dryer, the cover. (notice the warping of the center around the handle, and to the top edge of the middle circle on the lid). We had never seen such warping and determined that the damage was done from some sort of external heating, or possibly adjusting the heat thermostat.
Before we sent our filament dryers to the retail market they have been tested and re-tested with the worst possible scenarios we could think of to see how the survived the conditions of the testing. The damage that was noticed after we ran our dryer in an enclosed space with just the 1.25 inch clearance on all sides, as instructed in our manual did not result in anything that looked like the photo below.
It was our determination that the heat needed to melt and deform both the strong top cover, and the internal lip on one of the chambers had to have reached at least 100 degrees Celsius or 212 degrees F.
The temperature settings on our filament dryer is set at 35-70 degrees C or 95-160 degrees F.
It is an impossibility for the filament dryer to reach the high temperature needed to melt and warp the plastic used on our filament dryer, without some other form of heating applied, or temperature control adjustment.
Needless to say, this particular customer was very upset that we did not honor our one-year manufacturer warranty, but it was very obvious that the heat needed to deform the plastic as shown in these photos, far surpassed by the capability of heat settings from our manufacturer.
So please be careful in using our filament dryer and pay notice to the range of temperatures that are set by our manufacturer. If any damage is done by heating outside the range that the filament dryer can reach, then the manufacturer warranty does not cover products damaged by the following guidelines:
- Misuse, accident, abuse or alterations
- Serviced by unauthorized persons