I suggest putting corn starch on the klister to remove the greatest
amount of gunky stuff. Then apply citrus based cleaner that is diluted
with water. The only concern I'd have is the effect of the solvent on
the nylon shell. You may want to wait to see what others have to say
about the solvent piece. I'd get the corn starch on right away though.
Gary Jacobson
Rosendale, NY