I am sorry to hear that your Yorkie got his hairs cut around the nose.
I dislike this when people do that because when they begin to grow back they poke up into the eye area and is so annoying, for the care taker but also the Yorkie.
When I first got my pup she had this crazy doo. I grew it out.
Instead of using a gel from petsilk, I simply brought some flaxseed with water to a boil, set aside and strained into a jar.
I use a bit on my finger to apply when grooming.
It is natural, non scented and works great!
Keep the mix in the fridge. Take a bit out at grooming so to warm up a bit (as it will be very gelled from the fridge) and sometimes I may add a tich of hot water to thin it back out a bit so to be applicable.
Make a new mix weekly.