do you have and hps bulb? what you can do is put a VERY little bit of vaseline around the screw part of the bulb. so then it scres in easily and will screw out easy whenever the bulb goes out months down the line. if you have an hps bulb do NOT touch the glass part of the bulb with your hands as the oils of your hands will shorten the bulbs life span. but yes, vaseline will work and yes it is okay to do that.