something you may want to check out- http://www.bjs.com/kimberly-clark...920?dimId=
2.99 and it has 280 per box. That is nearly one penny per wipe. Ships free too. They are very thin so if you clean a laptop screen for example you may end up using 2 or 3 wipes but I have been using them for years and will never go back to the pre moistened wipes.
For a cleaning solution mix 91% isopropyl alcohol / distilled water (50 / 50 mix). I put the solution in a spray bottle and it works better then anything I have ever usd before.
source- i am an electronics tech