As Seen on TV -- Do they work?

I tried doing a search for this subject but I couldn't find anything.

So...I'm sure we've all seen those TV informercials selling today's hot new product. Sometimes they work and people swear by them and sometimes they just don't live up to the hype.

Not too long ago, my local NBC affiliate had weekly segments called "Does It Work?" and they'd test out the different products on TV. They don't have it anymore, though. Some of the things that worked were the belt thing that kept you cool and those portable lights that light up when you press em like a button.

There's an AS SEEN ON TV store here, but I haven't checked it out yet.

Have any of you guys purchased infomercial products? Anything you would recommend? Avoid? I saw the infomercial for The Lens Doctor and I'm tempted to try it because my glasses are just so scratched up -- but I hesitate because I'm afraid that it won't work and I'll just be wasting my $$$.

As far as what I'd recommend, I've never used it, but I hear The Do Drops work just as advertised. You know them...put a few drops of these into your toilet just before you gotta #2 and it'll totally hide the smell.

Oxyclean works wonders for the house as well.

Anyway, I'm curious to see what you guys have tried!