That happened to me, and I washed everything by hand (including foam) and hung to dry.  Number One is easy to get out.  No special products or techniques needed. Number Two is a different story :) 

Jeff 

Sent from my iPhone

> On Jul 9, 2017, at 8:47 PM, David McNeely <davmcneely40@GMAIL.COM> wrote:
> 
> 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