A fascinating aspect of Bluetooth-enabled devices is their ability to communicate with each other spontaneously when they come within each other's range. A Bluetooth-enabled cell phone can be configured so that it can automatically print out all its stored messages and photos using a Bluetooth printer as soon as you enter your office without any manual intervention.

Another advantage of using Bluetooth is its support for point-to-multipoint communications. This means a single printer can simultaneously connect to both your cell phone, as well as your computer and any other Bluetooth enabled device within its vicinity.

The HP 995c Bluetooth printer is one example of an inkjet printer with built-in Bluetooth support.

Here is an excerpt from a review of HP 995c done by PC Magazine: http://www.pcmag.com/article2/0,1759,10381,00.asp

"We found we could print wirelessly from as far away as 40 feet. And we found no significant difference in output speed between printing via a USB connection and printing wirelessly with Bluetooth."

Bluetooth is still in its infancy but from what I've seen so far it looks like it will be dominant wireless technology in future.

Ok, enough with chemistry lesson. What I'm saying is even though ammonia is great for dissolving ink please be careful when using it.

Most of toughest clogs can be fixed by soaking print head in a bowl of a 50/50% solution of ammonia and water overnight. If that doesn't work you can soak it in pure ammonia for up to 1 hour then a 100% water rinse.

If your print head is not removable you can inject a diluted ammonia mix (10% ammonia and 90% de-ionized water, or just use Windex) into an empty cartridge and run print head cleanings to get solution into print head. If clog does not open leave printer sit overnight and try it again next day. Many times clog will release overnight as ammonia solution goes to work.

Some people will tell you to use alcohol to unclog cartridges and print heads. While it may work for a short while alcohol will actually increase chances of another clog. This is because alcohol will tend to dry out plastics and metals in head. Alcohol will only fix very mild clogs that could probably be fixed with an aggressive print head cleaning. If you want to do job right use ammonia solutions as I discussed above.