It's a hard lesson to learn, one I learned a long time ago, but don't lend
anything you don't want back or are not worried if it comes back in working order.
Now I only lend out things or money with the thought in my mind that it's a 'gift'. If I get it back, great! If I don't no loss as I was giving it out without the expectation of getting it back. If you can't lend it with this thought, then don't lend it out. Regardless if it family or friends. Keep it simple, "Sorry, no, I'm not able to lend that out." At first it's tough to say and stick to it, but it gets easier as time goes on. Just stick to your guns and don't let anyone pressure you into changing your mind.