Still, line-drying isn’t always a recipe for crunchy clothes. The key is eliminating the hard water residue on your fabric. To do so:
Add one cup of distilled white vinegar to the rinse cycleUse one-half cup of powdered borax in each loadLessen the amount of detergent from the get-goToss the dry, crisp towels into the dryer for a quick fluff to soften them before folding.