1.) The filter must be replaced according to display every three weeks. But this is completely arbitrary. Because the filter creates depending on water hardness, a certain volume of water and because it does absolutely not matter how long he idly. Leaving aside the filter three weeks unused it is still as good as in the beginning and does not have such, as required by the display, to be replaced. So we can safely ignore the display.
2.) The filter must, if it has lost its filter effect will not be thrown around! It can be easily regenerated and as often. We use a pint of water in which we solve about 20 g of citric acid (there easily and most importantly cheap at any pharmacy). We can run three or four times through the used filter, then rinse twice and already has a good piece like new. Britta conceals this fact, of course. But it is completely logical that the proceeds. It would not throw away his dishwasher when the ion exchanger would no longer, but rather refill dishwasher salt ...
