So just a question, but has anyone here ever had these DIY insect screens before? Just thinking ahead to warmer months here it gets to a heat that's unbearable here with no AC units and the cost of a free standing unit being ridiculous, I was planning on getting them anyway to keep all the creepy crawlies out but was wondering if these would be safe to use with the windows open and the screen covering the whole window? I don't think a Tiel would be strong enough to pull them off right? and would you say the magnetic or velcro style one be better?