I have purchased 3 sets of new sheets recently. I hate them all. Thread count makes no difference. Stiff, scratchy, sandpaper like-300, 450 and 600 count, all cotton. I have washed, used fabric softeners, hot, warm water. Nothing works. Never have I had such an issue. What is going on with bedding? Did I miss something during the last 20 years? I just want some soft sheets. Don't even care about wrinkles. Just want some soft sheets that don't pill up. HELP ME!!!!