lcd backlight

https://ibb.co/JRcjJdp I honestly kinda wonder if it's normal for something like this to happen since I practically baby my laptop (I dunno if putting the charger on top of the lid while storing it in the bag or the weird towel with water droplets and microfiber cloth combo cleaning thing I did...

i want to increase lcd display backlight... normaly backlight is 28v but i need more brightness backlight with more than 32v can anybody suggest me solution for this .??