"As for the dishwasher, I do have a new one (about one year old), and it does have the option to turn off heated drying. I'll start using that instead. Also the clothes dryer is in a utility room, so I'll close the vent in there and keep that door shut when being used. That might help alittle too. "
Sam, closing off all air inlets to the laundry room could be a bad idea. In order to dry clothes efficiently, air is blown through the wet clothes, then exhausted outside. Where is the air for your dryer coming from? If you use outside air, the cool drying temperatures may not work very well.
Stretch