There are several ways to clean a Dell laptop and it depends which component you want to clean.  For the LCD panel, you will want to use a non-abrasive cloth.  There are cleaning solutions that you can find at your local store that are specifically designed to clean LCD panels.  The plastics like the palmrest, bezel or bottom base can easily be cleaned with a multi-purpose cleaner or pre-moistened cleaning wipes.  If your keyboard is dirty we would recommend you use an anti-bacterial cleaner because the keys accumulate dirt and molecules from our hands.  If you have debris trapped underneath the keys, you will need to use a bottle of condensed air.  By blowing in and around the keyboard’s keys you can effectively remove all trapped debris from within. 

If your laptop has been subjected to a liquid spill and you have the “sticky key” effect it would be much easier to simply replace the keyboard instead of cleaning it.  It all really just depends on how much damage was incurred.  Another component that you would need to keep clean is the cooling fan.  Over time It will accumulate dust and this debris must be removed in order for the fan to operate at an optimal performance.  Keeping your Dell laptop clean is only half the battle, being careful not to drop it, liquid spill damage, or exposure to extreme heat are maintenance factors that must also be taken into consideration.  A clean dell laptop is a happy laptop!