The robot was quite interesting... I had no idea..... It looked good working, but a couple of vids said it was rubbish, you still have to climb a ladder to insert it and then remote control it while you are up there. The gutter needs to be largish with clear access uninpinged by overhanging roof tiles as many british gutters are.
Mine(washing up wand) works without traction, you push it forward from the ground, and it has a water feed going in, and an exit pipe.I don't think I'll take it any further though.
