What has helped me cope with my OCD

Get a pet. A pet will challenge you like no human can. I can’t get mad at my cat and I can’t tell her to wash herself nor can I wash her every time she becomes contaminated. She WILL become contaminated and I WILL want to pet and cuddle with her. Letting her in my bed was the biggest challenge, but the cuteness is just too hard to resist.

Reframe contamination as a sensory experience. If you can feel, smell or see the dirt, then your hand is contaminated and you can wash it. If not, try to resist the urge to wash.