oh yeah i have this problem as well, and although needles and stuff are easy enough to hide in my closet, i can't store the estrogen vial itself anywhere in my room because it gets so hot. my very first vial of EEn that i got last summer started going brown within like 2 months, presumably because it was like 32°C for three weeks straight. my current solution is to keep my vials in the basement, buried behind a pile of suitcases and other stuff which doesn't get moved often, but i do worry that someone'll stumble upon it by accident (or worse, catch me digging through junk to retrieve the vial on injection day)...