I'm with Redwood on this one. I once used one of those "blowbags" and it came right back at me. Nice little mess. Thankfully the bathroom I was in had ceramic tile on the walls that cleaned up pretty easily.
I am curious about your experience with drain cleaning. I understand a license isn't required there (here in Texas, they actually created a special license just for drain cleaners just a few years ago). I won't get into that debate here, but I would hope that if you are relatively inexperienced, you really take time to research drain cleaning methods and the tools used. It isn't exactly "rocket science", but I'd argue that it is a bit of an art.
Ha! I'll bet I'm the first to refer to drain cleaning as "art"! :laughing: