Novelty, I use the bread bag, I mean the bag used for shopping bread, made of tissue.
If you're very demanding, glue stick is not the better solution. But it goes fairly well with me. After glueing tiles I wait glue to dry for a couple of hours. If fingers get glue, wash them!... It's not very difficult to glue tiles on the sides if we fold the paper just after positioning it on the tile and if we cut well the paper corners, if I made myself clear... From now and then some tiles unglue but if you reglue them better they won't unglue again... And if you're careful glue won't go either to the drawing or to the back. Apply the glue on the tile, not on the paper...