In my experience after putting on three screen protectors on the Nokia
N900 cell phone the biggest problem is dust. I'll do the best job I
can with cleaning the screen first, but while if I don't like
the result I can try again or try a different technique, once
you start putting a screen protector on, pulling it back of has a
chance to damage it. It isn't a one shot, but the more attempts you
try the less likely you'll get a better result.
- read the instructions that came with the protector
If you don't really care about the results, follow those, if you want
a better result, keep reading.
- apply in as dust free of a room as possible
This last time I shut off the vent to a guest bedroom, put an air
purifier with a HEPA filter in for about a week before putting this
protector on. I also had the best results.
- have lots of light shining across it
This is especially for cleaning to evaluate if you need another try.
- wash with detergent, rise with wet cloth
I put part of a dot of detergent on my finger, smear that on, then
use the wet/damp cloth to clean and then a dryer part to dry. Never
get it wet enough that the water would go inside obviously. The
screen protector came with its own cloth and I used that after this
step. It didn't do as good of a job of soaking up the water than a
cotton hand rag, but it sheds less.
- try to get it on correctly the first time
I start at a corner, partly lay the bottom edge down to make sure
it is straight and then let it bend into place. I only used the
advised credit card with bubbles, otherwise I use fingers or just let
it fall into place. The screen protectors have some kind of gel that
makes up for surface defects, but it is easy to damage and the more
tries the greater chance that will happen.
They are generally caused by dust. If it is a bubble outside of
the visible screen area, it is probably better to live with it, but if
it is inside that's a judgement call of trying again or leave it the
way it is. My last attempt resulted in one small bubble outside of the
visible screen area, but I was able to put it down on the first try and
so that's as good as it gets. So far I've kept the screen area clear of
- apply force, like a credit card to make a smaller bubble
My experience is this will still have a bubble, it just will be
smaller in size. You have to apply force to release the air before the
bubble is trapped. Generally this is my preference when it is outside
the screen area.
- pull the protector up and grab the dust off the screen or protector
These protectors come sandwiched with two layers of plastic (the
lower layer is removed before applying it, the upper layer gives a
handle which is handy to hold onto, but can be removed at any time),
the upper layer also has a little bit of stickyness to it. That can
be used to grab a piece of dust like tape, but isn't going to do as
much destruction to the gel as tape. I've done it but be careful.
- pull the protector off, watch it off, and try again
I found that a very light touch with your fingers, dish detergent,
and water smoothly running over it can remove dust particles. I also
found that with a smooth flow of water the water tension can pull
water drops off the surface to leave it dry for another try. I would
use this only for the most desperate situations, it's better to find a
less dusty environment.