mat_specular keeps turning itself to 0 whenever Garry's Mod is closed

[Psycommu]

Can someone tell me why this is? It's getting annoying to have to turn it on every time and wait through the loading.

P.S. "mat_specular" controls whether to show the shine on metallic/shiny props or not, if you didn't know.

Tell me if you need any more info.

[Psycommu]

There's a bit of a problem with that.

It seems to not exist.

[KFrohman]

What doesn't exist? Autoexec? Just make it yourself.

[Psycommu]

I made it, but it seems not to be working.

Just to be clear, where is it supposed to go in order to work?