I am a concerned Mom. I live in an apartment with the windows on the ground level. I think some-one is entering my home with out my knowledge. I have tried a few things to no avail. I need to find a solution to keep a "good" screen on without some one being able to remove it from inside especially but also on the outside I need to find some kind of lock to keep the window down and myself the only one that can raise it.Please help!: