Does anyone know that after you clean the dryer lint from the exit air hose you have only cleaned the tip of the iceberg. After some years of use, lint has built up outside the area where the lint trap resides. This is because the lint trap cannot trap all the lint. There will be lint build up on the exhaust fan blades and in the cavity where the fan is housed. This must be cleaned also. This is a bit harder that just taking off the air house. You may have to refer to the dryer assembly manual and remove the lint trap cavity behind the dryer or the front panel of the dryer. I'm not familiar with the newest dryers on the market. Please check your manual that describes the dryer assemblies and parts.
ddwjess