I just bought a Speed Queen dryer - DRY725C. There is a screw in the lint filter - how are you supposed to clean lint filter?

SOURCE: I have a 2004 Nexxt Dryer and the the lint filter light is staying on.

Same problem

SOURCE: Lint Filter Light comes on and cycle is interupted

I just found that the filter itself was not allowing airflow- I tested by blowing through it with my mouth- no airflow. I cleaned it with a high pressure air hose and noticed that the flow is much better now. I cleaned it by hand several times, and washing in water (which may have made theproblem).

SOURCE: Clean Dryer Lint Vent in Kenmore elite HE4

If you wish to clean the interior cabinet of the dryer follow these steps:

1. UNPLUG the dryer. Dangerous voltages are still present even with the dryer turned off.

2. Open the dryer door and remove the lint screen. IMPORTANT: You must remove the lint screen first in order to remove the blower fan housing.

3. Remove the lower toe panel directly below the dryer door by removing the screws under the bottom front edge of the panel. With the screws removed, the panel will drop down, then come off. NOTE: For better access, you can prop the front feet of the dryer up (a 2x4 works well).

4. Loosen the screws on the blower fan housing directly below the drum and remove. There's usually a small clip holding the cover in at the bottom that you may need to pull out to release. NOTE: You may also have to disconnect the auto dry sensor plug (yellow wires with white plug - use a small screwdriver to release the locking tabs) and/or ground wire to accommodate removal of the cover.

You should now have access to the dryer interior and the blower fan squirrel cage motor. Take the time to clean out the blower fan housing cover as well. A long bristle brush made for dryers works well at removing any lint inside the dryer in the hard to reach places, followed by vacuuming.

NOTE: After cleaning, you may experience a slight burning odor. This is normal as lint gets stirred up in the cleaning process and can settle on the heating components. The odor should dissipate after a short period of use.

If you have any questions, please let me know. I hope this helps you.

SOURCE: Bosch Axxis dryer - lint filter indicator lights up

Make sure the exhaust vent duct is clean all the way to the outlet.

SOURCE: Bosch Nexxt 500 series gas dryer lint building up inside dryer

Absolutely those dryer sheets are the root of all evil....I would also recommend a good vent brush to clean your dryer vent.
Follow these steps, it worked for me:
1. use a shop vacuum to clean out the dry vent or a vent brush.
2. Clean your lint filter with windex, hot water and and soft bristle brush.
If this doesnt work try running the until disconnected from the vent for a cycle to isolate the vent as your issue