Using this Bosch detergent dispenser is a breeze. First, make sure your dishwasher is turned off and unplugged for safety. Then, simply remove the old dispenser and place this new one in its spot. It should fit easily, but if you have any trouble, you can always contact us. As for the detergents, pour your main and pre - wash detergents into the appropriate compartments. Be careful not to overfill them. When it comes to maintenance, it's a good idea to clean the dispenser every few months. You can use a mild dish soap and a soft cloth to wipe it down. If you notice any blockages, gently remove them with a toothpick. Also, keep an eye on the dispenser's performance. If it starts to leak or doesn't dispense properly, check for any signs of damage. And remember, if you're ever unsure about anything, our team is here to help.