Amazing that you got that "lint brush" so nice and clean. Good job. Took a while, did it?
My favorite lint to pick out of the Trane/American Standard lint brush is cottonwood fluff.....
Which makes more sense to you? CONSERVATION - turning your thermostat back and being uncomfortable. Maybe saving 5-10% ENERGY EFFICIENCY - leaving your thermostat where everyone is comfortable. Saving 30-70%