Wait.. what??? I always see sheets that I wish were curtains because they're cheaper! Hot glue ribbon tabs to turn a bed sheet into a no-sew curtain. Genius! - Click image to find more DIY & Crafts Pinterest pins
Throw your shower curtain lining in the washing machine with some towels, put in the regular detergent for how much is in the load, and add one cup of vinegar (to cut through the soap scum). After running the washer, hang back up on the shower curtain rod to dry.