It can totally ruin their absorbency
Brigitt Earley, Reviewed.com
So you finally splurged on the the best bath towels—good choice! There’s nothing better that glorious feeling of a super soft, absorbent towel fresh out of a hot shower. But have you ever been met with a towel that feels waxy, greasy, and just spreads the water around instead of plush and absorbent? If so, don’t toss the towel: your laundry routine might have to change.
If your quality towels aren’t working the way they should, stop using fabric softener and dryer sheets. These items soften fabric fibers, which can reduce wrinkles and static cling on clothing, but actually have a negative effect on fluffy fabrics like towels.