There is a procedure for rehydration/softening of desiccated tissues that
involves soaking the dry tissue in a Phenol/Glycerin solution, followed by a
long wash in running tap water.  When the tissue has softened and has a
slight puffiness, it can be reprocessing on a short cycle.  

Many dry, hard, tissues have been salvaged this way.  It was used more
frequently back in the old Technicon days. (I'm sure that there are some of
us who still remember the basket of tissues hanging in the air overnight -
It was always such an interesting start to the day). 

I've used it for years, but do not know where it originated.  It was one of
those "goodies" that I picked up throughout the years. No doubt it was
passed to me by a colleague since my version was hand written.   If there
are references out there,  I would appreciate the information so I can write
it "properly" for our procedure manual.

Thanks,
Marilyn