What are some of the most common mistakes new pacman frog owners make?

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Coconut fiber needs to be changed out by looking at it visually or mostly by smell. Usually around 1-2 months is the average time people change out coconut fiber before it starts developing mold growth or bacteria growth. Humid, moist environment in a confined space obviously helps the mold growth process speed up, but with enough ventilation it won't develop for awhile. My coconut fiber is moist to touch, I grab and rake it around with my hand and if you feel moisture throughout then you're good. I haven't run into a lot of problems, but superworms I won't ever do again. They're just nasty, high in chitin and don't offer a lot of nutrition even though it's good to have variety. And they burrowed in my frogs substrate, I think I told you this already on your other thread concerning superworms which was annoying trying to find it and putting my frog in a separate container. When I first got my frog I wasn't keeping the coconut fiber moist enough and it looked somewhat dry or would dry out pretty quick. My frog would burrow more than usual and stay there which is probably because he lost his appetite and was trying to aestivate without me knowing I would burrow him out to feed which was not good. So, finally I found out how to keep it really wet... Just by dumping in de-chlorinated water from the bottle and just spraying it excessively while he was on the other side of the tank so I wouldn't directly spray him. The ground is a lot more moist and wet for him. I'm surprised how wet it stays now, it just locks in moisture. I leave a damp hand cloth over half of the screen covering, that helps too. Another thing I did was for lighting I used to think that when the sun came down where I live I would immediately have to shut off his daylight lamp, but you want to provide them with a day and night cycle that doesn't interrupt their feeding cycle and certain parts of the year longer day cycles affecting their activity, etc.