The wet to dry cleaning method typically works best for cleaning past the core region on male jumpers.
You’ll need the following tools:
A nonflammable cleaning fluid engineered specifically for cleaning fiber optic connecters such as the Stickers™ Fiber Optic Splice & Connector Cleaning Fluid.
The wet to dry cleaning process is straightforward. Add a small drop of cleaning fluid at the top of the wipe’s channel. Then place the ferrule directly on the wet portion. Lightly drag and spin the ferrule don the wipe channel from the wet portion of the wipe to the dry area. This one, fast and simple wipe cleans the clean the core, edge, and chamfer of the ferrule.