I teach to "check for ice" as part of the downwind checks, and then leave it well alone.
ie Brakes, undercariage, mixture, fuel, carb heat hot, check for ice, hatches and harnesses, carb heat cold.
That stops the risk of people landing or trying to go around with it on hot, 'cos you're not going to get iced up between late downwind and landing.
Still there are many different ideas on this one, no absolute right or wrong way.