Is it getting ready to molt?

[SpiderMom13]

We’ve had this B.Smithi since just after Christmas. It hasn’t molted since we’ve had it. It’s looking kind of like it has mange. Quite a few bare looking spots. Is it getting ready to molt???

 

[SpiderMom13]

Here’s a picture.

 

[Arachnoclown]

I'd say you still have a while. That abdomen will get super dark where the bald spot is.

This female still had 2 weeks before she molted. She got really dark but I wasn't able to get a good picture.

 

[SpiderMom13]

Thanks. At least I know that’s normal now. I’ll keep an eye on the bald spots for color change. I’ve added a better picture too.
Another thing, it’s been cozying up to the sidewall heat mat a lot lately. It hasn’t really been colder than usual, could this be part of that process?