Add the white vinegar to the spray bottle and fill to the top with tap water. Shake it to disperse the water through the vinegar.
Open your dryer and lightly mist the vinegar and water solution into it.
Remove the lint trap from the dryer and clean off any lint or debris. Spray it lightly with the vinegar water and reinsert it.
Throw the dryer sheets into the dryer. Use either scented or unscented. Scented will deodorize the dryer.
Run the dryer with nothing but the two dryer sheets in it for 25 minutes. Remove the dryer sheets and dispose of them. This will freshen the dryer and remove foul odor.