Mine has been replaced
The previous owner of my OD27 ripped out the old burlap-type liner and replaced it with a medium blue short pile carpet. Our OD25 had the same type of liner that we never replaced, and always had trouble keeping clean.(I'm not sure if your 23 uses a similar burlap material) I prefer the carpet; it hides stains better and makes the cabin seem more cozy.As for cleaning the hull-liner, I would only use a mild detergent (like Snowy non-chlorine bleach) and probably not use any kind of power cleaner. The headliner material is glued to the foam backing, which is glued to the inner hull surface. If you disturb the bond between the layers, or use a strong cleaner that starts to dissintigrate the foam, the liner may begin to wrinkle and sag.Good Luck!