Using this tote bag is a breeze. First, unzip the bag and place your four LED PAR lights inside carefully. Make sure they are evenly placed to keep the bag balanced when you roll it. When rolling, hold the handle firmly and roll it on flat surfaces as much as possible to avoid damaging the wheels. As for maintenance, keep the bag clean. You can wipe it with a dry cloth regularly. Don't expose it to extreme temperatures or humidity. If there are any small stains, you can use a mild soap and water solution to clean them gently. And always close the zippers properly after use to protect the lights inside.