The first step to cleaning a dryer duct is to feed the brush into the duct and move it back and forth while slightly.
Diy dryer duct cleaning kit.
Safely disconnect your dryer by unplugging the power cord from the outlet or turning off the gas or propane.
Then give it a trial run before sliding it back.
Extend the brush as needed and continue until the vents are.
If your dryer vent is too long to efficiently use a vacuum to remove the lint buy a dryer vent kit for an alternate.
Spin it with care as you push it in and then pull it out to remove the collected lint.
This part is usually located behind the dryer.