We have a model 13026W with indoor/outdoor temp (Alarm clock). All winter it was fine and seemed to be accurate. Now that the temp is near the 80's the outdoor temp seems to be accurate but the indoor temp is very high and is four to five degrees higher than our digital thermostat. Is there any way to re calibrate this unit? We have placed it all over the house and it is higher than than the actual ambient temperature measured in these spots. We do not have it placed near any windows or heat.