Shortening the vent hose on your clothes dryer can save you approximately $25 per year, and it’s easy to do.
Your vent hose should be cleaned with a vacuum at least once per year – so while you have it disconnected for cleaning, trim the hose so it’s just long enough to still allow you to pull the dryer a few feet from the wall. The shorter run will allow the dryer to run more efficiently.
Since you can do this yourself, for free, you’ll gain 100% of the savings.