Replaced both lower foam cushions in the Spider seats...what a difference that made. Wish I had done it much sooner in my 10 year ownership !
I know this is getting off topic, but I'd like to make sure that the record is straight here...I know this post is over a year old, but it's a persistent myth that just needs to be corrected (all due respect to rcmanners). A quick lookup of the Zymol MSDS documention on their vinyl products shows the presence of polysiloxanes in both available products. Which means, yes, Zymol Vinyl does indeed contain silicone.