once i learned that the actual temp. is 20 to 28 degrees off the higher the temp the farther off it is was very aggravating trying to figure out why my stuff wasn't turning out right till i got a couple different thermometors hope i have it figured it out now and it goes better next  time i may have got a lemon fustrating but i will deal with it as i am smarter than it is it might be fixable but i did not buy it to work on it or deal with all the hassles