Juliana: maybe these will help
I put ours on a tarp on the driveway then sprayed with a 50/50 mixture of vinegar and water with a squirt of Dawn. I scrubbed them with a brush, let them sit in the sun, then rinsed. They turned out perfect. Wishing you the best.
Hello, Ive hand washed my hammock cushions in a plastic tote - tub fashion sucessfully.
hometalk has some ideas: