Saw an older thread about whether you can actually wash M&S Egyptian Cotton sheets at 60 degrees (when label says 40) for allergies. Has anyone bought these or another type very recently and washed them at 60 without much shrinking? Bought John Lewis in the past and they were fine at 60, but their latest ones no longer say 60 degrees, and every time we wash them they shrink some more! Just bought the other ones on their website that say 60 degree washable, but when they arrived, they also say wash at 40 degrees on the label!