I saw a hint on the internet which said that I could dry strawberries by putting them in an oven of 210 degrees F for two hours. That didn't work and I even left them for an extra hour, but they were still just 'wilted'.
If you are going to use your oven, you need to keep the door slightly open (put something non-flammable in the door, like a ss knife) to allow the moisture to escape. Otherwise all you get is cooked strawberries.