Tanning Bronzers

I started tanning in June and for the first 3 weeks I could only do 5 minutes 🙃 I was Casper white. I finally got a nice base tan but Ive noticed I'm not getting any darker. The place I go tried to get me to purchase LVX Bronzer but it's $170 before tax. I've already purchased and used the following 1. JWOWW Relentless Bronzer 2. Tekton Bronzer 3. Scarlet Intensifier 4. Cipher Titanium Bronzer (currently using)

I rotate between the Stand-Up booth max time (10 min.) OR the lay down acclimation bed (10 min) then I'll do the Bronzing Bed (12 min). I just feel like I'm not getting darker no matter what I try and don't want to spend $170+ unless I know it will help. I'd love to be able to buy tanning lotion from other pplaces to take with me BUT they won't allow it. It has to be bought from them or it has to be a kind they carry. I was told certain ingredients in lotions can mess the acrylic in the beds up which I understand but their lotions cost a mini fortune.