* "The grass is wetter after the rain."
* "The beach is wetter than usual today."
* "She prefers wetter weather than dry."
* "The paint will be wetter if you add more water."
* "The sponge is wetter than the towel."
You can also use "wetter" in comparative and superlative forms:
* "This towel is wetter than the other one."
* "That was the wettest summer we've had in years."