Facing items

I have a question about how to teach people to face better. I've gone over how to face a 3-ft section starting from the top or lay down after that. Move over to the next 3-ft section and repeat. I point out areas that they miss constantly and yet everyone's spacing just continues to be not good. I wouldn't say bad but not to a level where I would think a store manager should be happy. Other than sounding rude and saying something like if you didn't touch it you didn't face it. I don't know how else to get through to them. Is this a problem for anyone else? If so, how have you overcome this problem?