This is an inappropriate review, on a product which had been treated in ways the tenant knew nothing about.. and not a purchase from Amazon. How do you even know if you have the brand advertised here?!
I have used this system many times and have never had a problem with use and cleaning.
Perhaps you did not purchase the correct type of cleaner for the problem you had. Perhaps the person who used them before you put solutions in contact with the wire not recommended by the manufacturer. How could you possibly rate this here when you have no knowledge of its history?
Complain to the landlord/or previous occupant, but it is unfair of you to try to influence the product sale on Amazon!