ok this sux ive been injecting myself prop winny eq clen b12 all is fine except for the winny sometimes when i aspirate then inject it doesnt move lol so i aspirate again and inject nothing doesnt move!! so i pull it out press and it comes out so i change the needle and go again and same thing its like its stuck or something.. happened like 4 times in 4 weeks small number but trust me BLOOD SUX lol and injecting again and again hurts :/ could someone tell me whats up ? why wont it go ?