Sniper, The oils are needed for the high speed looms. The fabric is then washed in a bleaching formula to get rid of the oil and to return it to a white color. The problem lies with the bleaching. UV brightners are added at this time to make the later added colors brighter. Camo clothing makers have to special order fabric lots without the brightners. Sometimes fabrics are mixed or the washers aren't cleaned well enough and we get the blue stuff. The UV dies are permanent and cannot be removed. What UV Killer tries to do is cover the brightners. UV Killer is not a permanent solution and needs to periodically reapplied. Treatment on some fabrics last longer than others while other fabrics are difficult to treat. It's all trial and error. Anything that will help me get closer to the deer I'm willing to try and this seems to work.

Happy hunting!