How would you clean the inside of your converter?

Just use compressed air. Turning pressure down is nonsense. Not putting the nozzle up close to components is commonsense. It's a lot of fun to use the compressed air stream to spin up the fan - don't do that! In fact, hold the fan so it won't turn when you blow it out. A finger or a pencil will hold it fine.

I've blown out computers that way, too many times to even begin to count.

Oh, if your compressor blows anything but clean air, you've got some other maintenance to do too.