How to clean your Legion

Cleaning the fans

Buy a can with compressed air made for cleaning electronics. This kind doesn’t contain oil.
Best to remove the back cover, so the dust can be properly pushed out of the laptop.
When cleaning, prevent the fans from spinning. Can use a finger to very gently hold them in place. Holding them in place is to prevent the fans from spinning too fast, which could damage them. Don’t press too hard, no need for it. And don’t touch the blades of the fans.
Don’t hold the bottle upside down to prevent liquid leaking form the can. However should the air come out in a liquid form, it will quickly evaporate.
Keep a distance of about 10cm / 4inch between the nozzle and the surface you want to clean. Especially be careful around the fan blades. Don’t put the nozzle directly against the blades, as that could damage them.
Use quick short bursts. As the air gets released, the temperature of the air in the can will change, affecting the pressure. Using short bursts allows the temperature to return to the normal.
Do it outside or in a well ventilated area. The dust cloud that will get released from the laptop will be surreal. Even if it may seem like there is not much dust, the compressed air will push every last bit of it, from every laptop part in range, into the air. Furthermore, the air in the can will most likely be methane, which you do not want to have in excess in your room.

A simple damp cloth should suffice. Just make sure the cloth is just damp and not soaked with water.
Do not use any aggressive solution. Ideally no solution at all, to prevent damage to the surface and/or coating of the laptop chassis. Don’t let liquid get into the laptop itself, so be extra careful when cleaning the keyboard, touchpad or around vents and exhaust.

There are cleaning solutions with cleaning accessories made specifically for cleaning display panels. Easiest and best solution to buy those. They don’t cost much and do the job well.
For everyday cleaning, a microfiber cloth should suffice.
When using the cloth, make sure it’s actually clean. You don’t want to use a dusty cloth, as the dust on it could scratch the display panel.