Have a Vertec 6600 on propane and pto fan. Last few yeas have been drying canola at 130-140* and drying down 3-4 points in one pass. Canola was close to freezing the last few years as well. This year got the sample way cleaner with much less chaff. Same temperature yet can only move it from 13% to 12% in one pass. Is it due to less chaff? Finished drying cereals at 180* with no issues. Cant seem to get dry canola unless it goes through a 2nd time.