The toothbrush I use is the soft silicone 360-degree pet toothbrush. You can find the toothbrush on Amazon. The liquid in the bottle is saline.
Fun fact: cats are super good about being groomed! They can’t reach their faces or ears without using a paw, so they get very happy about a human doing the job better than they could themselves! But, let the cat lick you too so they aren’t just taking grooming, but also giving it! They love that
I love how well you handle these kitties! Clearly they trust you. Another little tip to help prevent feline acne, always feed them with a metal or ceramic bowl, non porus materials don’t harbor bacteria like porus materials like plastic. Also making sure you regularly clean their bowl!
In my experience with my six cats, they all use ceramic cat bowls. But some of them have acne, some of them do not. I just highly recommend this kind of toothbrush for cleaning. I think this is more gentle for the cats than the other ways. BTW, these are not flea