Reprinted from Shomrai Shaboth - Chevra Mishnayoth Congregation
It is forbidden to have chometz (even if it was sold to the Goy) in a place where one may come to eat the chometz. Therefore, a mechitza/barrier of 10 tefachim (30 inches or 40 inches) should be placed in front of the chometz. This applies only to chometz. Kitniyos however, although Ashkenazim do not eat kitniyos, it does not need to be put away.
If the chometz is in a closet or cabinet one must lock the door or tape it shut so that one can’t open it easily by pulling the door to avoid someone inadvertently opening the cabinet. Even a glass see through cabinet is considered a proper mechitza.
Placing the chometz in a closed bag in the refrigerator or in a cupboard even on its own shelf does not suffice.
Chometzdike dishes and cutlery, as well, must be locked away for Pesach. A proper mechitza is not necessary for dishes, but it must be locked in a place that one can’t open easily.
Playdough should be put away for Pesach as children may put it in their mouth.
Non-edible products containing chometz that are used topically (i.e. shampoo, soap) even when they are nifsal me’achilas, the minhag is not to use them on Pesach based on the principle called sicha ke’shesiyah. In a case of need one can be lenient and use these products. Regardless, these products do not have to be locked away.
Products that contain liquid alcohol that is chometz should not be used on Pesach and should be locked away.
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