* As wet as a drowned rat: This is the classic simile for being completely soaked.
* As wet as a sponge: This implies being saturated, like a sponge that has absorbed all the water it can hold.
* As wet as a dishrag: This is similar to the sponge simile but emphasizes the feeling of being limp and heavy from water.
* As wet as a dog that's just been for a swim: This conveys the image of a dog shaking itself off, still dripping with water.
* As wet as a freshly washed car: This emphasizes the shiny, glistening effect of water on a surface.
* As wet as a waterfall: This compares the wetness to the constant, heavy flow of water in a waterfall.
The best simile to use will depend on the specific context and the desired effect.