Just noticed that fan you got blowing directly on it, I have the same style fan and it will give your plants wind burn which gives it that claw effect too, I think if if it was toxicity there would be burnt tips with a dark green color, you might want to try one of those mini clip fans and don't put the wind directly on it you just want the fan to cycle the heat and air around not to blow directly on it just a tip I learned the hard way.