Weird Humidor Question

I know this sounds weird, but has anyone else ever had a problem with their humidor having too strong a wood smell? (Told you it was weird). I have been using the same humidor for about 5 years...maybe more. It is Spanish Cedar lined. Lately I noticed all my cigars having a "sour" taste. (It's not exactly sour but the taste is hard to describe...it's woodsy, citrusy, sour.) I then noticed that it tasted just like the humidor smells when I open the lid.

I have been using the same beads for quite a while so I have taken them out. I took all the cigars out and am leaving the lid open for a while in order to let it completely air out. It's not a big humidor...holds about 100. I was just wondering if anyone else had ever experienced this and if anyone had any suggestions. Thanks!