If you are having difficulties with a bear, remove all attractants. If the problem persists, call your local Natural Resources Office. For example, hunters, anglers and hikers may carry the spray if they can reasonably show that its purpose is to protect them against an animal attack. Capsicum spray is no guarantee against injury from black bear attacks, but it can often act as a limited deterrent with limited range. The spray can be somewhat effective in repelling black bears in remote areas, but less effective against bears strongly conditioned to human foods and garbage.
Some capsicum leaves a reddish dye on the fur, which makes spotting a returning bear easy.
Handle the spray carefully, and use it as a weapon of last resort. When choosing a spray repellent, you should look for a quality product that has a superior dispensing mechanism. If you carry a spray, you should always carry a full can and be familiar with its dispersion characteristics. This will require that you practice discharging a can in an area away from people. The rehearsal will be money well spent.