Johnny,I have {never } left my UV junk cards in a garage,attic or anytype of a storage units of any kind! Try my home I live in! Here In Missouri, we have big temp"s swings! It can hit over 100 ,in the summer times ,with humid air that can hit 70 to 90%.It also goes to under 15 to 20 below {0} ,in the winter time,in fact the Chiefs game in K.C. will set a all-time record for a high temp for a game ,today!So it is the card companies fault, not mine!Robert D.Hysell!!!!!!!