There are several ways that old clothes can be maintained. First, you have to launder the clothes well, and preferably according to the directions given on the tag. However, the manufacturer may not give specific details, such as the type of laundry detergent that must be used for a certain fabric. For animal fibers, such as wool and silk, gentle detergents should be used while washing in the gentle cycle or while hand washing. Examples of gentle detergents include Woolite (Gentle Wash) and Seventh Generation laundry detergent. For thicker fabrics, such as tweed or denim, you can use regular detergent. You can also choose detergent based on the color of the fabric, such as black and dark colors. Woolite makes a detergent specifically for black clothes and another one for dark colors. After washing black clothes and dark-colored clothes, one should have a lint brush to get rid of the lint.
You also need to invest in a good iron, and be careful to follow the instructions on the label. The delicate fabrics need the lower setting and the stronger fabrics need the higher setting.
For moth protection, you can try the camphor balls and cedar wood in the closets and the clothes drawers. When hanging up the clothes, you can use slim velvet clothes hangers. These don't damage the clothes and they save closet space.