How to keep the inside of my car windshield from fogging up?

Question

The inside of my car windshield often fogs when it rains and the defrost doesn't do it's job properly. Is there some kind of product or chemical I can use on the inside of the glass to keep the fog at bay?

Answer 1

the windshield in a car is actually two pieces of glass with a layer of polimer in the middle to keep the shield from breaking in large pieces in case of impact. This makes it harder to control the temperature of the glass on the outside as well as the inside. Fog ,during rain,on the inside only indicates the shield is a different temperature on the outside. The automotive industry uses defrosters to control the temperature of the glass thus giving a clearer view threw the glass. My advice would be to find out why the defroster wasnt giving me the proper results. If you choose to use a chemical, then rain-x is about the best and can be used both on the inside of the shield and the outside. Rain-x can be found at any walmart store and will be cheaper there rather than an auto parts store. good luck

Answer 2

Might want to try Rain-X anti Fog.

There are other sprays that go on clear for use inside of scuba diver's masks. I don't know how cost effective that would be but that stuff works great.

Answer 3

I am not sure of the brand name but there is an anti fog spray which you can buy at any local auto parts store

Answer 4

Clean your windshield inside . You could have a bad heater core.
When you clean the window use a white towel. If the towel discolors , you heayer core may be leaking.

Answer 5

Open your windows. a little.

Answer 6

maybe rain-x?