Toilet or tissue papers -- not a good idea. Many pulp plants
produce silica during their growth. (Some plants, like some
horse-tails are so high in silica that they are used as sand-paper
for fine woodwork, I still use them today when camping for
scrubbing pots & pans.) You may not notice anything now but months
and years of a habit of using ordinary pulp papers and you'll find
your anti-reflective coating worn off, or worse.
Remove as much of the larger bits of dust as you can with your
breath or other air source. Then I'll use a lens brush to remove as
much dust as possible. Then use a micro-fiber cloth to GENTLY try
to remove any fingerprints. If there is a stubborn spot I'll use
some liquid lens cleaner with a micro-fiber cloth. One of the best
liquids I've found I obtain as surplus from
http://www.sciplus.com under
their name of "Rexton Optyl-7" I buy the larger 8oz. bottle for
only $4.00 then divy it up into smaller drop applicator bottles for
my camera bags. One 8oz. bottle can last forever. They also have
the micro-fiber cloths there too for only $2.00 each. I get several
as I'm always handing one to someone or losing one somewhere.
(Browse through their stuff at sciplus.com, they have lots of
surplus lenses and filters and things for those DIYers out there,
even a blower-bulb for getting rid of dust on lenses. I just made a
neutral density filter for my EVF on my F717 (it inserts inside of
the rubber eye-cup) so my night-vision isn't impaired every time I
look into that search-light-bright image when taking photos of
aurora, meteors, and other things at night.)
) 
No more lens pens for me.. 