Your hammock can last for years if cared for properly, including keeping it clean and dry. If you have a rope hammock, fill a bucket or tub with cool water and a mild detergent. After taking down the hammock, make sure you tie up the arm strings together to prevent tangling. For added protection, you can slip a pillowcase over the strings. Dip the hammock into the soap solution and gently swish back and forth in the water. After the soapy water has washed away most of the soil, refill the bucket or tub with cool, clear water and swish again until the soap is completely rinsed out.
If your hammock has wooden crossbars, make sure the wooden pieces are not dipped in the water, as this will ruin the finish and may cause premature warping. If it is possible, remove the spreader bars before washing the hammock. You will need to air dry the hammock, making sure that you let it dry completely before storing to make sure it doesn't mildew in storage due to dampness. Your nylon hammock can be washed using the same method as the cotton hammock.
If you own a fabric hammock or quilted hammock, simply use a soft scrub brush and a bucket of cool, soapy water. After spot-treating any stains, wipe down the entire surface with a soapy sponge, then hose off with cool water before the soap has a chance to dry. Let the hammock air dry where it is suspended.
Your hammock stand can be washed using a sponge and cool water as well. If the paint has chipped, you may touch this up with automotive touch-up paint. This is important in order to prevent rust. In some shops, you may be able to find small bottles specifically for touch-ups.