Hi gargoyle
Welcome storing paint............
Ready now I will begin Paintballs don't like being stored in dirct sun light. It is very bad for them to get too hot they sweat and start to degrade
please don't wash them if you get a breack in the bag! Roll them in between kitken paper or a towel.
Paintballs don't like to get too cold all sorts of nasty styff happens.
Keep them out of sun but warm if you are cold in a T **** it's too cold for your paintballs turn them every 2 to 3 days and vary which way is up. Try not to drop the box as you may get a breck in the bag (if so don't leave them clean them up asp) Once open keep them in pots or any air tight dry container. If you do this they will have a shelf life of up to 3 months depending on what condtion they were in when you brought them.
They should be perfectly round with no flat spots or dimples and have a nice shiny appearance (thin coating or oil) If not don't buy them they will get worse!
There are diffrent grades of paint and some blaze inferno hell fire cope with the cold better. We are still not using midnight it's been too cold so hence your problems. Even joe public has been shooting blaze!
There are summer and winter grades and at change round there is always a couple of weeks of totally **** paint
It should be warm enough for midnight or if you are on a budget recball soon especially if it's only for practise
Happy balling
Sparklie
would have replyed sooner but it ate my first attempt