Bees are a great problem because if you try to remove then it can sting you which are painful. Hence you need to make sure whether it is the bee and not wasp. If you know that it is a bee then you can use the right pesticide that will kill the bees and you will have no problem. This is simple but the bees are threatening as their sting is aching.
The bees are usually black in colour with a yellow touch on their body. You can easily recognize them with their colour and find the best medicine to control them. To protect your room you can place a cardboard on the air conditioner or even a red film will do the work. You can spray soap water or bee killing liquid which will kill them. This procedure has to be followed for some days to get permanent solution. Thus prevent yourself by employing any of the above ideas.