Male glider will develop musky odour when they reach maturity age, and they will do marking on the cage/owner/other gliders as well.

However, neutered male glider woudn't have such issue. Most of the cases happened where the smell drop a lot after neutering.

For female glider, they smelss good for me. As long as you clean their cage, food bowl and wipe their body regularly, i don think there is any problem in smell.