If I put water in a plastic ziplock sandwich bag, does it 'reduce' the melting point of the plastic?

alright, so my computer is overheating, and my solution was to soak fabric and place it down on top of an area with no openings (since obviously water and electronics don't mix, so if I put water on a place with no openings, the chances of water getting into my computer and short-circuiting it are slim to none) but my parents were against that.

so, my next solution would be to use a plastic bag, since even if there are openings, nearby, they're useless if the water can't escape the plastic bag.

given that plastic bags are quite thin, I would assume their melting point is quite low and melting plastic allows water to escape, aka the opposite of what I want. However, I also know that Water is good at evening out heat, so if I do what I want, and put water in a plastic bag, will the plastic melt? or will the water spread out the heat evenly, 'reducing' the melting point of the plastic?

Look I've seen dumber questions on this site please don't banish me to the shadow realm for asking a dumb question