Yes, you are correct that slobbers can be a sign of malocclusion. How long have you had your girl? Is this the first time you've noticed a wet spot under her chin? Usually, slobbering is something that happens on both sides of the mouth, and is ongoing. If this is the first time you have seen this, I would probably wait and see if it happens again. If you see consistent drooling over the next day or two then take her to the vet for a dental workup. Otherwise, she probably just got into something and got it in her fur. As far as removing it, unless it is interfering with her mouth in some way I would not try to remove it yourself. She is not likely to take kindly to you pulling on the fur around her face. She should clean it off herself over a period of time with regular dustbaths. If it really bugs you though and you want to clean it, a damp cloth should do to wipe the fur clean, then dry it completely before you let her bathe in the dust.