[peterpost2]

I wonder if putting the dishwasher in soft water mode will also reduce the risk of this. Should use less rinse aid then.

[perlgeek]

Doesn't the software/hard water mode just affect how much the ion exchanger (filled with salt) is used?

[cubefox]

Perhaps, but as a matter of fact, soft water needs less rinse aid. Not sure whether the hardness setting of the dishwasher takes this into account.

[peterpost2]

You could very well be correct, it's definitely not my field of expertise.