Well glad you got a yorkie, but they need their bath.
I bath my every 7-10 at home, and every month 1/2 or 2 month, I take them to the groomer for hair cute !!!
Since they go out everyday, I wipe them down everyday, and they love their brush.
Now my new babies didn't get a bath until their 12 week, and now that they're 14 week , I just took them in to get their 3rd set of shots, The vet said I can start brushing their teeths. Now that will be done every bath day.
Yorkies are high maintenance, compare to other breeds.