Silca gel for a Lifepod 2.0 case for my EDC that is in a cars trunk most of the day?

Hello everyone I have had mt EDC a MP 2.0 Metal Compact in a lifepod case with Speer Gold Dot ammo for about a half a year now. I was just told that since I am out and about so much that I should leave some silca gel in that case? Also something about the foam insert affecting it as well? I have been researching and there are disposable little ans big ones and even rechargeable ones? Looking to not waste money but get what I need if I need it.

Thanks in advance.