2 days ago i changed my hermanns sand as i do every 4 weeks,however,ive noticed a change in his behaviour.he has been walking around in the viv none stop with no rest, and although he has been eating and going to the toilet he is constantly banging on the glass to come out. this is really unlike him as he normally seems laid back and happy.could it be the dampness in the sand thats making him hypo or is this just a coincidence.nothing else in his routine has changed?he comes out of the viv for a few hours every day and has his regular baths.please help im an extremly worried mum.