So last night I worked with Waylon on latching. It's like he can find it, and knows it's there, but…

So last night I worked with Waylon on latching. It's like he can find it, and knows it's there, but keeps turning his head back and forth trying to get it in his mouth. So i put on the shield, and he of course finds it but won't sucks. Its like it too big or something. Any advice? Since day 1 he's had a bottle with breast milk and supplementing with formula. How can i get him to latch???