i have a ps 35 that is roughly 5 or 6 yrs old. a couple of years ago i started to have problems with the snap 2 disc tripping. i replaced it and had no issues again that yr and last yr it was only a problem a couple of times. this yr the snap disc seems to trip every few days. the thing that is most frustrating is that during the day it will run no problems but once we go to bed it will start tripping and some nights i am up four or five times resetting it. i deep clean the stove once a week and empty the fire pot daily. i also clean the stove pipe twice a month. of course starting tomorrow we are suppose to have feels like temps in the -30's and the stove has decided to act up again. at the moment it is doing okay as long as i have the stove set on low. because my elderly mother lives with me i have the thermostat set up to 74 because she is on blood thinners and always cold. any suggestions would be greatly appreciated.