I'm really happy with this kit - I mostly got it for the air blower and the fact that a few extra items were included was a nice bonus.I did a little research about how to use all the bits before using them. In case it's helpful to anyone out there, here's what I found.- - -Procedure of cleaning lens:The first step is to shine a light on the lens with a flashlight to assess what cleaning option you'll need. Can you see dust or smears? Each has a slightly different approach to cleaning:- - -CLEANING OFF DUST: "dry clean"* Dry clean Option 1: the air blower (aka "rocket blower" in some tutorials.)Blow off the dust with the air blower. It's best to do this with the lens pointing downwards so that the dust flies down away from the lens.* Dry clean Option 2: brushAnother way to clean off dust and small particles is using the brush. There is one in this kit that's part of the "cleaning pen". Before using the brush on the lens, you may want to use the air blower on the brush to make sure it's super clean. Never put your fingers on the brush since that may get grease onto it which can smear onto the lens. Using the brush, get in all the nooks and crannies of the lens to get any trapped particles out.- - -CLEANING OFF SMEARS: "wet clean"Before doing a wet clean, first do a dry clean to remove any dust particles that may damage the lens if rubbed around onto the lens during the wet clean. Only once you've removed any particles, then go onto the wet cleaning stage.* Wet clean option: Cleaning penThis pen has 2 ends. On one end is a brush (for a dry clean, brushing away dust and particles), and on the other end is a little sponge-like pad. In the original "Lenspen" cleaner this has a carbon compound on it to clean oils, grease etc. (There was no text on this pen to confirm it so I don't know if this one has carbon compound on it too or some other cleaning mechanism.) To use the pad, you can breathe out on it to get some condensation on there to help it work better, and then using circular motions, use the pad to clean the lens.- - -CLEANING THE REST OF THE CAMERAMicrofiber cloth:Some people recommend only to use reusable the microfiber cloth on the outside of the lens or camera, and not on the lens glass itself because if you use it once, it collects some dust and other particles which risk scratching the lens, or it can collect grease (eg from your fingers when you use it) which risks creating new smears on your lens instead of cleaning them.- - -Alternative uses for this kit:I also used the air blower to help clean my laptop computer keyboard and that worked really well.- - -(PS apologies for the repeat posting of this review - I'm not sure why that happened!)