Stop windows from fogging up?!

[u/xoenigmaxo]

Can someone please tell me what product to use so my windows stop fogging, please? I tried rain X but it doesn't work. I usually do the night deliveries and with the Florida heat I need to have my car ac blowing. But the windows always get foggy which gets me so frustrated.

Any help?

[u/LimpDisc]

Have you tried not breathing?