Jebus sell em some Rugs or Sumthin~Mine was NO Where near that bad, However it was on pretty much white carpet w a deep yellow drops of color so.......
WD is Rough, It Stinks like WD and YA GOTTA Rinse it REALLY well, infact
If ya don't it'll turn black from attracting soils. If the Home Owner or Occupant tries it and is un-edumecated in the process, it will turn black, so they will call ya back : )
I personally use a squirt bottle of my flavor of the day Juice after the WD, beats hunting the Inline and overall just helps lift it all without really droppin a bucket in the floor to get it out : )