there is moisture between the glass of my sliding doors and I don't know how to fix it.
You can't , your seals have broken. All you can do is replace.
Doors and windows fog up when the warm moisture in the air touches the cooler glass. All you can do is remove the moisture/dry the air. That may not be possible in your home, but running a dry air furnace and dehumidifier may help if it bothers you that much.
the seal has been broken, its rather difficult to repair and a bit expensive, cost out the price for a door.
If it's not the side that opens you can hang semi sheer curtains and leave them closed over that side.