magnacleans for me, no probs apart from a minor leak a spanner cured easily, only issue was a customer removing the lid without turning off the valves, lol, rang me to have a rant, until i pointed out that i had shown him where the instructions were and that i had demonstrated how to clean the magnet because he insisted on cleaning it himself every 3 months???, still now its being cleaned annually when i service his boiler as his wife doesnt want wet carpets again.