Many of us have experienced the sinking feeling as we watch our computers fall to the ground, or a screen flicker and go dark after a small liquid spill. It’s just good common sense to keep liquids away from your computer.

This week’s hint is in honor of the heat wave, and is really a two-part tip. Remember that while your computer is in an air conditioned building or car, and then taken outside to the hot, humid air, condensation will form both on the outside and inside of the computer.

This holds true for any electronic device, and is probably the most common inadvertent warranty-voiding event we see in our shops. The best way to avoid this is to put your device into a sleeve or case that’s been in the cold environment, and leave it in the case until the temperature equalizes.

The second thing about heat and humidity is that we tend to crave and consume lots of cold liquids. Right now I have a glass bottle of ice water sitting in a pool of condensation. The floor in my office isn’t perfectly level, so this liquid began migrating towards my MacBook Pro. Had I not noticed, odds are that liquid would have invaded the computer through the seam between the bottom and top cases.

Common sense here, as with all things in life, could save you many thousands of dollars.