You've tried hot water, vinegar, leaving the door open.

The smell keeps coming back.

Here's why:

Pet hair + detergent = biofilm that traps bacteria. That bacteria makes your laundry smell.

Vinegar can't dissolve it. Bleach can't remove it.

You're fighting a buildup problem.

fello™ dissolves the biofilm, breaks down pet hair, and kills odor-causing bacteria.