Question on using moss for humidity

I have tried EVERY method I have seen on here ( aluminum foil trick, seran wrap trick, warm towel on top of the lid, warm towel inside the tank, misting...did I leave any out?) and STILL I can get my humidity to rise to about mid 50's- low 60's for about an hour or so, then it drops right back down to the low 50's.

I have seen folks say they use moss. How much do you use, any specific type and do you need to keep wetting it or does it retain it's own moisture?

My temps are 90-92 hot side, 80-82 low side. It's a 10 gallon tank. I use coconut substrate. I HAVE to keep a heat lamp on top of the cage to maintain the temps due to the room he is in. I can not switch to a tub at this time, as easy at that seems it would make it, so that sugesstion is out.

I use a fogger.

Sphagnum moss can be picked up at most pet stores (even Petco should carry it). You'll have to wet it but it can be used to create a humid hide inside your tank. You can also just use wet paper towel inside a hide as well. The one thing that is killing your humidity is the heat lamp. I can tell you from experience. I went through it. Humidity would go up...but heat lamp dries it right back out. Here is what may be an option for you. I bought an oil radiator space heater for the room my snakes are in. Keeps the room around 75-78 all winter long. No more need for the heat lamp.

Just make a damp hide. They will go in it when they need the added humidity. You can use one of those fake rocks with a cover or a tupperware with a hole cut out (be sure not to have any sharp edges) You can search on here for directions.