And taking off the heads is exactly what I did to free up mine given the circumstances. :ROFLMAO: Was very pleased when I found that it was the gas/gunk combo and everything cleaned up nicely.
Thank you, thank you! The torn seat there is thanks to the neighborhood nuisance pit bull. I thought about grabbing up one of the seat covers, but may just fashion a replacement when I get the time (currently thinking of a two-tone to match the color scheme of the new paint job once done).