I've just got my washing machine repaired. The bearings had gone and considering it was only a year old I think it must be the towels and bath mats that damaged it so quickly.
I'm a bit scared to put them in. Also because the full load programmes take 3 hours. So I generally wash on the 1 hour mixed which is only 3.5 kg so half the full load of 7kg. Mines a small machine compared to a lot.
I wash my towels and bath mats once a week generally. Maybe I should only put in one big bath sheet and a hand towel, but will take me a week to get everything done.