My Mills have both started to grind the Salt and Pepper to dust. I prefer larger grains, the Salt especially is that fine that it resembles Icing Sugar. They are the ones where you twist the body and hold the head. I have adjusted the tension but it does not make any difference. They've been cleaned out, again, no difference. Is it time to chuck them? And can anyone recommend a decent set that doesn't cost £££. I know this sounds like a Non Issue but do a lot of cooking from scratch and prefer freshly ground Pepper, not pre cracked that you can buy.