Do the clothes in your dryer still feel damp when the cycle is finished?
Make sure you clean your lint trap after every load.
Check the outside exhaust to make sure the air is escaping.
Keep the area around the outside exhaust clear of foliage, debris, snow, and ice.
Does your laundry feel hotter than usual when the cycle is finished?
This can be a sign that your dryer’s temperature control thermostat needs servicing.
What type of duct work is your dryer venting made of?
Plastic flexible duct work is more prone to kinking and crushing that can speed lint build-up and restrict airflow. Make sure to check this type of ducting often for signs of blockage.
Rigid or flexible metal ducting is most often recommended for maximum airflow. Make sure to follow the manufacturer’s recommendation when installing duct work.
Has the duct work been cleaned?
Have a professional clean the duct work from the dryer to the outside exhaust. To find a professional, search for “dryer vent cleaning”
Dryer vent cleaning “kits” are available commercially if you like a do-it-yourself project.