Pour in at least 1⁄4 US gal (950 mL) of lukewarm water. Make sure you have enough water to submerge the clothing. The water also has to be close to room temperature in order to stretch out the fabric’s fibers without damaging them. Borax and vinegar are recommended for animal-based fabrics like wool and cashmere. Plant-based fabrics like cotton may also respond to this treatment, but don’t try it on synthetics or tightly-knit natural materials. Leave the towels inside your clothing for up to 30 minutes to help it dry out. Layer some additional towels underneath and over it to speed up the drying process. You can also shake the garment around if you are able to keep the rolled-up towels in place. While you’re waiting for the garment to dry, check its shape. Fine-tune it by gently pulling on the edges of the fabric if needed. Place a hanger inside the garment, but don’t remove the towels. Move the garment to an exposed spot away from direct heat and sunlight. Try using a hanging bar or rod. Once the garment is done drying, you can hand wash it in cold water if it doesn’t feel as soft and smooth as it normally does.  If you’re worried about damaging the sweater, lay it on a towel to let it dry out. Wool and cashmere are delicate, so play it safe when treating a particularly valuable piece of clothing. If the clothing doesn’t change enough, repeat the cleaning process several times until you get the result you desire.

How would you rephrase that briefly using Vietnamese?
Làm đầy bồn rửa tay với nước ấm. Hong khô quần áo ngoài trời ít nhất 15 phút. Treo quần áo để hoàn tất quá trình hong khô, rồi giặt lại nếu cần.