Your choices are:

1. Open it up and try regreasing (don't recommend due to time involved in pulling it out again if it starts squeaking)

2. Open it up and replace bearings if you can find a match. (good choice)

3. Open it up and replace with new blower (best choice)

There is no way you are going to get any lube on the bearings by spraying into the blower intake.

Vin