take the mattress cover to a laundrymat and wash it in the jumbo sized
commercial front-load washers without the agitator.  NO BLEACH. i use tide
powder and oxi clean pre-treater.   DO NOT DRY IN THE DRYER OR YOU  WILL NEVER
GET IT BACK ON THE MATTRESS.  let it air dry on a clothesline.

as far as the foam, spray/rinse it out with a garden hose, and then take
the foam and let it soak in the bathtub for a day in mild
deturgent/disinfectant.

In a message dated 7/9/2017 11:48:21 P.M. Eastern Daylight Time,
davmcneely40@GMAIL.COM writes:

My  little granddaughter had a night time "accident" while sleeping on the
top  bunk mattress of my 1991 Volkswagen Vanagon GL Campmobile on a camping
trip  this week.  I have washed the mattress covers before (quite a  long
while ago actually), but don't remember now how I went about it.   The label
simply says it is "viscose," (same stuff as rayon), and "Do not  wring."

My washing machine is the old fashioned kind with an agitator,  and of
course, a spin cycle.  Can I wash the mattress cover in the  machine on the
"gentle cycle" using cold water?  Should I not spin  it?

What about the polyurethane foam of the mattress itself?  How  do I clean
that, especially to remove the urine from the  foam?

mcneely