When I got Jake at 9 weeks, I started training him right away. I used Bil Jac's Little Jack Chicken Liver. He would go crazy over this treat + it is the perfect size; small enough for puppies.
As for cleaning his face and other cleaning routine, start with touching your puppy everywhere! What I meant by that, even if you aren't cleaning him, establish with him that it is okay with you touching his face, opening his mouth, touching his butt, touching his tail, touching is paws, squeezing his paws, touching his nose, just everywhere. I did this with my Jakey. At 6 1/2 months, I can do anything with his face like pinch his nose when he wouldn't let go of something he isn't supposed to play with. I can open his mouth when he is eating something I cannot see and then take it out. When he eats his meal, I can touch his face, hold is paw, grab his bowl and moving it around... just about anything while he is eating. I can do this because I have established early on that it is okay to be touched.
One piece of advice, start training as soon as you get your puppy. 2 minutes max per session 3x a day. Your puppy will look forward to this routine and will be so unhappy when you forget lol. My Jakey gets grumpy when he doesn't get trained. Also, it doesn't have to be food as treats. Jake loves plastic bottles. I use that as his treat.
Sent from my iPad using Tapatalk