How to make glossy slime like this one and can inflate well?

This is a screenshot from Tanooki slimes on instagram

I've been trying to replicate this texture but I failed all the time. It's either stretchy but constantly sticky and not inflating no matter what I do, or not stretchy and "breaking" if I add a bit more activator to make it less liquidy and sticky.

I used white glue with borax + water the first time, and the second time I tried the same but with adding air drying clay for a thicker result but it would not work like what I see when people add clay to their slimes.

Is there an ingredient I'm missing?