The baseboard buddy works okay but doesn't work as good as it shows on TV. If your baseboards are really dirty with grime then you'll need some cleaner to put on the baseboard buddy or even faster just get down there and scrub it.
I don't let my baseboards get that dirty in the first place so I just use a rag and wipe them down every other month.
Doesn't take much work if you keep them clean from the get go and you won't have to scrub them.