The toilet seat is automatically cleaned after every use in these public WCs. For this purpose, the seat is pulled into a technical room where it is cleaned and disinfected. The seat is dried whilst moving back out. The linear guide system used should be stable and resistant to corrosion, dirt and cleaning chemicals. Two drylin® T linear guide systems each with two carriages were screwed together with the milled Corran toilet seat. The guide rods are screwed on the stainless steel seat and in the cleaning trough. The toilet seat is moved by a step motor.