Dishwasher had been chucking up dirt into the mugs/cups on top...I bought a D/W cleaning thing ....but thought calgon every wash would be good ??
Ds (aged8!) has pointed out that the picture is of a washing machine ....and not a dishwasher in sight 
Oh and why do you need to add the salt stuff run out and not put it in for ages...is this bad !
Thanks