Berlin over at Berlin's Whimsy has an excellent tutorial on creating a homemade swiffer mop cover. All you need is:
- Basic sewing supplies (machine, thread, scissors, iron, etc)
- 2 pieces of terrycloth material (eg. towels), at least 12 x 14” each
- 2 large and colorful buttons, or velcro
- Tracing paper
Berlin takes you through the process step by step and includes her pattern. Check it out.