The plush nature of the chenille gives it absorbance comparable to a sponge, which can make stains a real problem. The key of how to clean chenille patches is immediacy.
If your beloved child has just spilled something on their letterman jacket, use a dry rag or paper towel to blot up as much liquid as possible. When cleaning a letterman jacket or cleaning chenille patches on a letterman jacket, never rub, scrub, or wipe at the stain. This damages the delicate chenille pile or wool of the jacket and can cause the stain to spread.
Once you’ve blotted up as much as you can, fill a bowl with cold water and add a few drops of a mild clear liquid dish detergent. Dip a rag in and then wring out as much water as you can.
Gently dab at the stain with the cloth until the stain is gone. This may need a few extra dips into the soapy water. When the stain is gone, wet your rag with clean water to blot up any soap in the pile. Lay flat to dry.
If your beloved child has come home and the stain has dried, follow the above directions only to bypass the blotting up of the spill.