When I regularly showed all or some of the pack, I made everyone who came to the house go over a dog and look at teeth. Postman, milk delivery boy, casual visitors. The more they are handled by different people the better.
Personally, I always ask the handler if they would like to show me the teeth when I judge. There used to be judges who undid Basenji tails ! I smacked the hand of one such away, telling her there was no need for that. Needless to say, I didn't place ! (But I noticed she didn't do it to subsequent dogs that day).
I have never bathed a dog before a show. They are always very clean, even this morning though the woods were very muddy. By the time we arrived home, both were pristine. And I love bushy tails ! Trimmed whiskers do NOT get my vote either.