For hard plastic protector like Hercules, the small blob at the center is due to the oil from your face or hand because you used the camera without protector. I bought the same hard protector for my 2 sigma dpmerrill. The first body I bought and pasted the film type then after a week remove the film and put the accmaxx protector and there's no small blob. For the other body, I bought I did NOT put the film protector and used it, the next week when I paste the accmaxx protector, there's a small blob in the middle. Even though I clean the screen with lighter fluid or screen cleaner solution the moment I put back the hard protector I will have a smudge of oil in the middle. What I did was repaste the film screen protector first and paste over the hard protector and the smudge disappeared. Just a tip I you want to remove the hard type screen protector, you can use hair dryer so it will be easier to remove the protector. Sgcamera is already selling Hercules for xe-1, I bought just this Friday.
