Unless I'm bathing my Kimchi, I normally just use a wet, warm "towel" which is actually those microfiber finger covers used to "brush" teeth. When I first got her that finger cover was so big compared to her mouth but was a great "face wash rag". I still use it mostly for cleaning her face but occasionally I'll try clean her teeth with it since her mouth is just big enough for me to rub the outer teeth. Otherwise I'll occasionally use wipes made for the doggie face. I'm otherwise usually hesitant about using any soapy product on her face, but wouldn't mind seeing some suggestions, myself
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R.I.P. Mick & Mandy (before 2010), Mila - 4/3/15, Chloe - 2/18/16, Kimchi - 6/2/2021