Cleaning a keyboard: First de-dust. Dampen rag with white vinegar and wipe down the keyboard to rid the grease. Use spray bottle with diluted vinegar to wipe the screen clean. Use toothbrush or Q-tip for speaker-holes, ear-bud for grooves.
disconnect keyboard and trace between the keys with a cotton swab lightly dipped in isopropyl alcohol. If your mouse is the kind that rolls on a ball, unscrew the bottom and go over the ball and the interior with a cotton swab, too.