Don't Remove Your Dryer Sheets
When I do more than one load of clothes, I leave the dryer sheet from the first load in the dryer. They still smell good and I'm sure they have some life left in them. When I put the second load in the dryer, I still put in a new dryer sheet, just in case, so the second load now has two dryer sheets.
It can't hurt and I think the extra dryer sheet makes the laundry smell even better and helps to keep my clothes from getting static cling.