Q. My family owns a cottage we use during the Summer months, and we often go away for several days or during weekends. We wonder if we leave on the outside garden a large BBQ grill, if we have to be concerned that someone may have come and used it when we were not there, as the garden isn't locked out, and therefore it is not kosher anymore. Is that a real concern?
A. Since it is unlikely that a stranger braking in into your property would clean up the grill properly, you can easily tell if it was used unlawfully by someone else. Besides you may also tell by the amount of propane extant.
The Rov also recommends in general to have security cameras installed for different reasons. The fact that these cameras are indeed common in our days, makes it unlikely that one should be concerned that their grill was used by strangers.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit'a