The water here is a bit weird! In the winter tds is about 50/60
Took a reading yesterday and its 140
We run di only and ours only last about 2/3 weeks!!
Last week I was cleaning and thought the water smells a bit funny

So tested it and it was showing at 110

only had 2 jobs left and as I was 45 mins away from base carried on cleaning
not one complaint or call back

But now test my water 3 times a day!