In regards to the air data sensor heats, I'm afraid I don't understand your first sentence: If they are left latched after landing (and therefore latched for the next flight), under what circumstances would they ever be unlatched? When do the procedures you're referencing indicate that they should be unlatched? The provided checklist in the inibuilds manual suggests they should be unlatched after landing. That implies that they would remain that way until the next flight, and that they would be latched again during perhaps pushback or at the holding point.
In regards to the Pilot and FO window heats, the buttons simply don't seem to function. Latched or unlatched, the "idle" light does not illuminate.