Great job keeping your Roomba’s brushes clean, and if you’re wiping down its IR sensors and charging contacts, you get bonus points. But have you checked your Roomba’s wheels lately? If you take a closer look at your Roomba’s caster wheel (the one in front), you’ll probably see plenty of hair wrapped around its axle, while clumps of dust are probably lodged inside the compartments that house the side wheels. While it’s easy to ignore a Roomba’s wheels, you should be checking on them on a regular basis; indeed, iRobot recommends giving them a look every couple of weeks. This how-to is part of T…