Recommendations for best way to clean my English saddle (with doeskin knee rolls), without saddle soap? IS there a safe way that won't damage the saddle? (Silly question -- I'm just outta saddle soap, and I'd like to clean it for sale). Any recommendations greatly appreciated! Stubben Siegried...

so i bought my saddle used and i love it. but it seems like there is some wear in the seat. at first i thought it was just dirt that i could clean off, but as i cleaned the area it seemed to get worse and worse. so then i figured that it's almost like its super dry, because its feels very rough...