I recently purchased some Woodmaster cherry pellets to use in my A-maz-n tube smoker. They did not want to stay lit. So I tried putting pellets in some shallow pans, set in the sun on warm, dry, & breezy days. Pellets were about 3/4 inch deep & stirred about once every hour, then took inside each night. After 3 days of this, Mixed with Cabela's pecan pellets at 1/2 of each. These stayed lit just fine, but still need to try all cherry to complete test.
Several other things I did was using stainless hose clamps, installed 4 short legs that keeps tube up about 1/2 inch up from surface. Put seam in tube on top side to help air flow. Also noticed some ash on inside bottom of tube that I used a discarded toothbrush to loosen & remove. Have now had 4 good burns with this setup.
Should mention that our elevation is about 600 ft & am using a Bradley Digital electric for a smoker.