Has anyone washed a britax marathon car seat cover in a washing machine?

Hi - just read the label, was shocked to see "do not machine wash" ... am i really supposed to hand wash every time it gets dirty????? Has anyone used the washer, maybe the delicate cycle? Success, or problems?

Yes, I washed it on delicate, and then hung it dry...it was totally fine. I have a Marathon and a Decathalon, and they both did fine. Just don't use any heat, to wash or dry!