[header] How to clean money [title] Repurpose a lingerie laundry bag. [step] Take an old lingerie bag or buy a new one from the women's section at any clothing store. You will use this to protect your paper money in the washing machine. 
Lingerie bags are small, zip-up bags made of fine mesh that are designed to safely wash delicate undergarments. The bag will keep heavy streams of water and the movements of the washing machine drum from destroying the bills.