FORSPARK Air Conditioner Covers for Outside Units, Durable Central AC Cover for Outdoor- Fits up to 38×38×40 inches

How do you wash the cover?

My ac compressor is 30l x 30w x 40h inches. if i order 34w x 34l x 38h inches, will it fit by having the extra w and l make up for the h? thanks!

What is the warranty? Some stitching on my cover is coming undone and the seam is opening after 4 months if use.

Do you have a 43w x28h