It’s not too difficult. Go to spigens website and you’ll Find answers.Do you mind sharing which Spigen it is? I been looking for the screen protector that covers everything (don't want the notch cutout). And was it easy to install (does it come with the installation frame thing)?
For the last 2 years I’ve been using my devices without screen protectors and getting them replaced around the 6 month mark. Now my insurance has reached its claim limit, I bought two protectors for the Tablet and Phone.This is what bugs me the most. I really don’t get anything other than surface scratches and rarely those. But the smudges are a pet peeve of mine. For the price of the Mantos compared to Shellrus, I could change out the protectors every month for 2 years.
Even then the Oleophobic coating wears off long before I get a replacement. If the bare screen can’t figure out long lasting Oleophobic coating, I wouldn’t bet on screen protector manufactures achieving it.
You can change a protector every month and get a new coating. But from my experience cheap protectors, are worse than even a worn out screen. Try out a Belkin or Ottorbox amplify and see how long it lasts. I am loving the Belkin with its damn near perfect replication of the iPhone coating.
I am not rich enough yet to spend $40/month on a new Belkin protector, so would be interesting to see how long it lasts. So far it’s been 2 or 3 weeks I’m not sure and it is great.