Objective: How to fix a dryer that is not drying.

Which of the following solutions is more sound in terms of naive physics reasoning?

Pick your answer from:
(A). Remover dryer's lint filter and wash it out with soap. Check to make sure the dryer vent is not clogged up.
(B). Remover dryer's lint filter and clean it out. Check to make sure the dryer vent is not clogged up.
(B).