Some are better than others in both power and nozzle angle/placement. Sometimes you have to shimmy to get the angle just right if the power is low. It should result in a wipe in which no fecal matter remains, only wetness, if executed properly.

I forget the brand but there was one you could etch a design on the cover of the CD with the burner. Futuristic tech at the time.

Hot cakes en Mexico