You're welcome! There's a lot of great websites for instructions of how to reduce the mites. Of course it will never be 100% free. I also used a spray to kill the existing mites and their egg cycle. I'll link. But there is prep work before just spraying. I deep-cleaned my whole house, little by little, including sofas. I vacuum 2 times a week. I also will be swapping out my fabric bed headboard for a wooden one. Invest in good mattress and pillow covers.
The Ecology Works - Dust Mite and Flea Control 2 lbs
https://www.amazon.com/dp/B006G8YJXE/ref=cm_sw_r_apan_glt_fabc_55QS0WCQ1C9BRPC697EF
Here is one but I don’t necessarily only mean this exact product. I think it goes on anything you’d want to eliminate mites from
https://www.amazon.com/Ecology-Works-Dust-Mite-Control/dp/B006G8YJXE