Front loading or top loading washing machine?

Can anyone suggest me a good descaler for a Bosch FL WM?
Used Fortune descaler powder ones before. Now there are a lot of options. Liquid or Powder then umpteen brands?
 

All good tips in here. Particularly like the point about fabric weight matching. If you mix heavy & lighter clothes it increases the friction on the lighter clothes and can lead to them wearing out sooner. Could also contribute to colour fade.

Many people think washing machines wears clothes out faster but if there is a fabric weight mismatch everytime you do laundry then that's the cause right there.

The same with wash temperatures. I don't think 40 is going to damage anything. Even though the label says to use a lower temperature. But if the fabric is delicate it would be better placed in a delicates bag if mixed with heavier clothes.