Meet up at Channel Lurkerlounge?

[--Pete]

Hi,

The last two sprays spewed out some sort of liquid that dried almost instantly, but not something I'd want to subject my CPU to either.

Not to worry. All those duster products are some kind of liquid (used to be freon, but that's not used any more). The products are liquid at room temperature but at elevated pressure. When the pressure is lowered to ambient (one atmosphere) the liquid turns into a gas (and cools off). If you turn the can so that the liquid is forced out, then you get the effect you noticed. As long as the board you're spraying is not powered, you'll be OK. The thermal bit is more of a problem than the liquid -- probably why they want you to keep the can 2" away, so the gas can warm a bit.

--Pete