No need for a leaf blower. Here is the method that I have used with great success and works well IF you have a rigid straight pipe under the house.
- Clean the dryer outlet and flex that connects to the dryer and reattach to dryer
- Remove the louvers on the outside and assemble the vent brush
- Set the empty dryer to NO heat and start
- Go outside and spin the brush through the rigid pipe
- Stand to the side and be prepared to get dirty
You will be surprised how much lint comes out of a seemingly clean vent system. YMMV