Take that "laptop" (brand, model, cost to you, age, warranty, value of data are all unknown) bottom half completely apart. An ice cube tray is handy for keeping small parts separate. Photos of every step. Soak and rinse every part except hard disk in distilled water with agitation. Repeat 4 times with fresh distilled. Let it dry out for a month. Reassemble. Turn it on with crossed fingers.
Rebuilt a 2011 Lenovo G555 that needed a new motherboard.