This is the simplest fix to the problem but it will only be temporary.
Glass door fogged up.
Use a dehumidifier to maintain fog free sliding glass doors.
Then you have a revelation.
You wipe the inside pane with the sleeve of your bathrobe and the cloudiness remains.
You wake up one morning and notice one of your double pane windows or patio doors is a little cloudy.
The cloudiness is between the two panes of glass.
The main problem with a foggy sliding glass door is that the gasket is no longer sealed.
Maybe it s happened to you.
What is causing a foggy cloudy haze on windows and sliding glass doors.
Part of the appeal of sliding doors is the view to the outdoors they provide.
You wipe the outside pane and get the same results.
This air will cool.
Inspect around the doors and the doors themselves for cracks and insufficient seals that can cause cold.
Troublesome condensation within the door glass often fogs that view particularly on days when humidity is high.
Dehumidifiers remove moisture from the air in.
How to eliminate fog on sliding glass doors dehumidifier.
Try slightly raising the temperature in the walk in cooler.
On a dry day the moisture will escape.
Fortunately fogging and moisture trapped in glass sliding doors can be fixed.
Moisture trapped between double panes of glass typically occurs when the seal between one of the glass panes and the door frame is broken.
It allows moisture into the area between the panes.
A damaged door gasket could let in warm moist air into your walk in.
Sunday september 30 2018 if you have window panes that are clouded over it s likely that they are double pane insulated and have lost the inert gas sealed between the two panes of glass.
Therefore you will need to start out by drilling a hole in the gasket for the moisture to escape.