Have anyone tried Mr. Gasket Cataclean to clean their catalytic converter? (P0420)?

I have a P0420 code on a 2010 Honda Accord V6. I'm not sure if its the O2 Sensor or the Converter though I've been reading reviews on Amazon that a product called Cataclean works. Autozone has a sale going on with that product and willing to try it but I want some inputs beforehand! I rather pay 20 bucks for something than 900+ for a new converter!

There's only one way to "clean" a converter and it's a last last last ditch effort. You disconnect a spark plug and run it at about 2,000 RPM until the cat converter to overheats. Then you stop. Sometimes, and I mean sometimes, the overheating can burn off the crud. However, if this doesn't work, it also destroys what's left of the converter.

As for your P0420 code. Whether the snake oil works or not, you still have to find out what CAUSED the cat converter to go bad in the first place. Read this article on what causes that

http://ricksfreeautorepairadvice.com/catalytic-converter-problems/

Possible causes
- Three way catalyst converter Bank 1
- Exhaust tube
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module (ECM)

Read more: http://engine-codes.com/p0420_honda.html

Do you have any other codes? Fix them first as sometimes they cause a 0420 to pop. More than likely (if no other codes) the heated O2 sensor isn't responding properly, these are very finicky and are know to go bad. It's a $20 part, you can "borrow" an O2 wrench from parts store, make sure you clean the connector with QD Electronic Clean, spray the old male end of the plug, wipe the spades off with a clean rag, respray and connect/disconnect it 3-5 times, this will clean the terminals of the female end that's attached to the car. Replace with the new sensor and hook it up. When you do this unplug the battery's positive cable, this will also reset the codes,

It may be advisable to get the QDEC (walmart $3-4) and clean the connectors before getting a new sensor, many times there's just a poor signal and cleaning the connector will solve that, also check the wiring to ensure that nothing has rubbed it bare. Take sandpaper to any ground points of the car (sand the frame and eyelet until shiny, wire brush the bolt), I don't know how many issues have been fixed by just cleaning the connectors and ground points.

Also: fixes in a can don't work, if your CC is plugged up, which I can almost guarantee on a <5 year old car it's not, you have bigger fish to fry. Spraying cleaner through a hole or adding it to your gas tank, neither will works for this, no matter what anyone says.