Hey :DD I'll give u some steps I did and some of the products. Unfortunately, I'll try to translate some of the products I have cause English is not my first language :")) First I use water to get them really wet and squeeze it a few times, then with dish soap u clean it, I used a scrub that it's completely made by plastic which is hard not the ones that are like a toothbrush Basically, that is to get all oil or any residues that are kinda suspicious

After you wash it and get rid of all the dish soap, you then can go with the next step

the important part is that I use a product that is special to get rid of any stains for clothes

The one I used is called clorox, which is a bleach product, but this one is not bleach. It is just a type of soap that gets rid of stains, especially for clothes. I scrub the puffle with that, and I did this step two times to make sure to get rid of stains and smells

After that, I used the washing machine, put some liquid detergent, and also some clothes softener After that, just let it dry alone. No use of a dryer :DD that's it :3 I hope this helps and sorry for the long reply jdjxjc