I have never had a problem with PM rub-ons but I have with other brands, i.e. K&Co. Something worth considering is the temperature and the lolly stick supplied with the rub-ons.....the plastic ones with PM are dreadful. If your storage area is cool let the sheets warm a little before use...if it is really warm......cool them down as the glue can be too sticky. My solution to all rub-on problems was to buy a Glitter Ball large ball embossing tool to burnish them. Never had a problem since......with any make!!
Marli