How to paint wet surface?

raincole

I'm texturing a monster's tongue. I've set the roughness to 0, but it still doesn't look wet at all:

I'm aiming for a very wet and glossy stylized feeling. Something like:

(reference from ArtStation - Tongue monster )

Any tips on this?

BagelHero

What does your layer stack look like? Is there another layer possibly taking precidence over this fill layer's roughness settings?