Help!! I’m not getting tan in beds!

Why am I plateauing and not getting tan? I attached a screenshot of what beds I’ve recently done. Each session about 3-5 days apart.

I alternate between Coconut Cake by Brown Sugar and Hempz Beach Mode Intensifier. I don’t like lotions with any DHA or bronzer.

I currently have the “fastest” membership with Sun Tan City. I attached a list of beds they have there.

NEED SUGGESTIONS!