Answer:
um ok old pastels should not go bad unless they crumble or do not smear if they do that then they are definitally bad and u should get you a new set as for leaving them in a garage im not quite shure if they will melt it just depends on how hot it is but in the winter they should be fine in the garage as long as u keep them away from pests such as rats....
Step-by-step explanation:
i hope this helps your welcome :)