Hello, over time soap and softener remains sticking on the wall of the tank, I have cleaned one and I had to use a spatula to remove it, the procedure is as follows: * remove the lid that is above the solenoid valves, remove the cover where the plate is, remove the screws that hold the top cover of the washing machine, now you can lift it back to access the tank, then remove the screws that hold the hydro balancer ring (upper part of the tank) remove the ring, go to the turbine and remove the round plastic cover, below there is a 10 mm screw with a washer / lock, remove the screw and upwards the turbine comes out, then remove the 4 10 mm screws that hold the base of the tank to the transmission, now pulling up and moving to the sides releases the tank of the transmission, with everything outside you can perform the cleaning, greetings.