Quick release cannot be tightened I had to patch a flat yesterday and now my quick release won´t tighten up anymore. It makes a ratchet Sound when I turn it trying to tighten it. I remember it was hard to loosen the quick release when I removed the wheel yesterday. Any ideas?

The quick release is in pretty pristine condition so I thought I would ask advice before replacing it outright.
Sounds like the thread of your skewer and/or the end nut is stripped ... as an emergency measure you could try inserting a slotted washer (see below) under the nut so that the QR can be tightened again, but for a proper repair, you'll need to get a replacement skewer.