Easiest way to apply mayo to raw chicken

I don't want to get bacteria in my mayo jar and touch the raw chicken over and over again cause you have to do both sides of the chicken. It was kinda messy using a butter knife and I had to touch the chicken both sides 4 times in total and it was messy and kind of uneven. And I was worried about bacteria/cross contamination the whole time. I used a spoon so it was kinda difficult to do the right amount of mayo as well before applying with a butter knife .

Edit: Very happy and surprised at the amount of support for my silly question. I love this sub. I will keep trying my best as a cooking beginner..thanks all.