How to fix this? With the original post, I was not able to test these out so I asked for input from all of you and we got some great responses (along with a lot of "This is what happened to me too!" comments).
"Next time...try a lower temperature...my oven has a "keep warm" setting which, according to my oven thermometer, is about 175*. Also, lift them off the baking tray. I find that wire cooling racks work well. If you don't have cooling racks, parchment paper will help, but the wire racks seemed to work best. I've never personally done strawberries, but I did peach slices last summer. Check them after 2-3 hours and see how they're doing. My peach slices took about 5 hours, but smaller fruits will probably take less time. Better luck next time!"
From Kori S:
"I would use parchment paper to help with the sticky-ness, but i found this website and in the comments it has peoples tips on drying fruit in the oven. Good Luck!