Never wear heavy hairsprays, colognes, or perfumes. Since mosquitoes are scent driven, this will actually attract them. If in a highly concentrated mosquito area, you will have to use more than just one band. People have a certain body chemistry, where even pure DEET will not work. Don't take those comments personally, as they are more out of pure frustration than anything else.
Most people use it once and throw it away. . . which is good.