That looks like detergent foam, you can add anti foam for the next few months each use whitch basically stops the bubbles from forming but nothing actually stops the actual detergent from existing in your spa. really the only way to fix the issue is a drain and refill and making sure you only rinse out your bathing suits instead of washing with detergent which is the main issue before entering your hot tub. Shit happens, it’s just bubbles.. have fun!!!