What happens if you wash a bra with hot water? Certain fabrics, especially delicate ones like silk, lace, cashmere, or certain synthetics should avoid being washed in hot water at all costs. Depending on how delicate an item is, you might decide to hand wash it rather than toss it in the washing machine. What should not be washed in hot water ? · save this comprehensive list of things to never wash in hot water as a reference guide for the whole household. · we spoke to our experts for their tips on how to do laundry and they shared the seven items to never wash in hot temperatures to avoid a long list of damaged clothing and linens. Can you wash clothes with hot water? If you want your clothes and household items to last longer, avoid damage, and maintain their look and feel, here are 10 items you should never wash in hot water —and the science behind why. · hot water can ruin delicate fabrics like rayon, rayon blends, wool, or silk by shrinking or breaking the fibers. Should you wash in hot water or cold water? · it may seem like a no brainer to turn the hot setting on when you do laundry, but there are a few items experts say should never be washed in these temperatures. · we asked laundry pros to share all the items to never wash in hot water , so you know what to avoid. Does hot water fade clothes? Underwear & bras. Find out what they are in our guide.