Do you take any notice of the washing machine knob?

If you look at a washing machine you'll see a dial with various settings. (if you don't know where your washing machine ask the wife to point it out for you). There's a setting for cotton, one for delicates, even one for whites but anyone can use it these days, plus many more.

But do you use the different settings or just stick with the same one regardless? do you sort out your laundry or just bung everything in all mixed up?
Do you take any notice of the washing machine knob?
Do you take any notice of the washing machine knob?
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