Water bottles can leak, I suggest getting a water silo. Silo's don't leak, and don't malfunction because there is no ball n tube. I have 3 silo's on each cage at different levels, one up high one in the middle n one low to the floor. Low to the floor in case a glider is to weak to climb to a higher one.
these are the ones I use, they are awesommmmmmme easy to clean, you get 4 of them for the price of One of the other ones and these hold more water.
No more spraying his pouches and fabric things, even IF they say pet friendly. Most pets are not in pouches like gliders are. Pet friendly sprays to spray a couch a dog may lay on is considerably different than spraying a pouch and putting a 80 gram glider in it.
Even some laundry detergents can have an affect on gliders tide being one of them.
Use mild soaps unscented is best, no fabric softeners.
Give him a clean pouch n remove anything sprayed with the febreeze. If the cage was sprayed it needs washed with dawn dish soap and rinsed well also. If he was fine before you sprayed his pouch and the symptoms started right after I would think there maybe a potential link to that.
How does his fur look and feel?
diet yes he needs on a better diet but we can't guess if he has calcium deficiency only vet tests can verify or dismiss that. He may have just been dehydrated and weak or fell and injured his spine etc there are to many possibilities and variables so we really can't and shouldn't speculate on a diagnosis.
Critter love is a good diet so is bml those are the only two i personally recommend. [url]http://www.critterlove.com/diet-info.html[/url]
Critter love you will need to order online, bml you can find all the ingredients locally but do not make any substitutions for measurements or ingredients unless the recipe specifies a substitution.
Don't worry about a wheel right now it's a mute point if he is struggling to even walk. If a glider is that weak we prefer to limit activity until the glider is strong enough for it anyway.
make things in the cage accessible to him by lowering things closer to floor especially if it's a tall cage, lower his sleep pouch, water, food. It will do him no good to have in the cage if he can not climb to get to it.
I don't know if he is single or not, but even if he is don't worry about getting him a cage mate until he is healthy and doing better. There is no sense adding and exposing a 2nd potentially healthy glider until you know what is going on with the current one. It's far easier to treat one glider than is 2 or more.