It is safe to clean the lint filer in a GE model GFDN120EDWW dryer. Specifically, clean the lint filter by moistening fingers and removing captured lint before each dryer use. Once the lint filter is cleaned, put the clean lint filter back into place before using the dryer.
Once a year, have a qualified service technician vacuum out any lint in the lint filter compartment. This technician can also clean the interior of the dryer, vacuum the exhaust duct and clear any debris from exhaust hood. Regular professional maintenance of the dryer prolongs the life of the dryer and ensures the warranty.