I need to clean my keyboard for my Lenovo laptop. The space of the strokes are very low.
Try a canister of compressed air. Shoot quick blasts of air directly at the "crud" between the keys. Don't spray continuously for more than 1-2 seconds, or the air will get too cold and may damage your laptop.
I also recommend doing this outside, so the crud that flies out of your keyboard doesn't make a mess on the floor.
A useful hack that I have seen passed around is to use Post-It notes and scoop up dirt with their glue-covered edge when moving that below a row of keys.
Later I modified that technique and now use strong tape (duct tape style, the stronger the better). I take a small spatula (ideally one with a bent head) and wrap it with the tape outside-in, then move that below the row of keys.
(Now that I say it, using double-sided tape to cover the spatula could be even simpler as the tape can not get "lost" below the keys as it would stick to the spatula head.)
First, to clean a laptop keyboard, you must disassemble it to reach the membrane of the keys, now if you just want to clean the surface of the keyboard, you must pass a towel or paper slightly soft and moist to remove a little dust or even spots on the letters. This action must be carefully applied since a drop of liquid that penetrates the inside of the keyboard could affect the long-term functionalities of the keyboard.
In the past I've pried up all the keys one at a time and really cleaned up the crud which accumulated beneath them. All are easily removed and replaced. The long keys which have guide wires beneath them require special care in replacing, but they all seemed to go back and function again. Surprising all that junk has been sitting under the keys. LOL