I still haven't noticed Hugo leaving any litter in his substrate for weeks now I'm really worried, weird thing is that he eats as normal, and moves around like normal. But here's the thing, it's 6 o clock in the morning in Sweden and he began to make some real weird noises, sounds like a squeeze toy sound... I'm not sure if he's just rubbing against the bottom of the plexi-glass but that doesn't seem to be it cause I hear it frequently once every minute and he's still at the same spot not moving what I can tell. The other problem I have except the ones already mentioned is that I yesterday found some mould at his plants (I've been having problems keeping the moisture level below 80%). and today I saw some mould (I think) on some of his substrate, so now I'm thinking about changing all of it even if it's not dirty, but what about my frog? Could he be sick from it? He doesn't look constipated btw so it's really weird the whole situation...

Please help me everyone...

*UPDATE*
He/she stopped making the sound after 10 minutes... began doing it when his day lamp turned on 6 o clock...