Okay,
Daughter and I rebuilt the Pit and gave it another whirl, we actually used suds this time (Dog Shampoo

) and more elbow grease. Started on the back which became really really bad after I screwed with it the first time. Still dingy looking and there is now a decent sized spot.
Flipped it over and aggitated the front reallly good working in about 2x2 sections then proceeded to start sucking. Looks alot better and is now upside down with a blower puffing it up.
The Black Pit plastic (all I had and lowes was out) had this white looking, Im not sure what was in it film. Yuk !!
All I can say is glad this My RUG

Chris
next Morning: Looks better but I can still smell the funk!
wash it again?