Thank you for viewing. This is an ELECOM lens cleaner. I purchased it in 2024 to resolve Blu-ray reading errors and have used it once. Thank you for your consideration. The following is quoted from the purchase site: Wipes away dirt and dust that has adhered to the pickup lens for cleaning. This is a wet-type "multi-lens cleaner" suitable for devices that cannot play discs. Blu-ray Disc players/drives have two types of reading lenses. This product can clean both types of lenses. It also supports CD/DVD players/drives and can be used for multiple purposes. Features a rescue brush. This brush is designed to clean the lens by utilizing a few rotations during disc detection after the disc is set. It helps to initiate disc reading in drives that do not recognize discs. The ultra-fine split yarn of a new synthetic fiber, which is a layered combination of natural and synthetic fibers, removes dirt thoroughly without scratching the lens. It uses a method of dripping the cleaning liquid from the label side of the disc. The appropriate amount permeates the brush on the back, so there is no worry of the liquid scattering inside the device.