Do turn your clothes inside out before washing. That’s the way they were assembled, and especially on dark items, you’ll be helping preserve the rich dark tones (and any applied graphics) from unnecessary friction. Do use a delicates mesh bag to prevent snagging, tearing and stretching. Do separate fabric types when you can. Cottons and polysters need different temperatures and spin cycles. Don’t overload your washing machine or use too much detergent. And don’t use hot water unless you need to. Today’s machines and laundry detergents work just great with cold or cool water. Check the garment care instructions.