(Makeh B'patish-מכה בפטיש Ep. 45) (#923) Is one allowed to knock on the door with the key, knock on the window, use an electric bell, and have a little bell ring when one opens the door?

(Melting ice.) Other types of necessities (in conjunction with putting frozen liquids and warm areas): child, oneg Shabbos, etc.

to clog a small crack in a pipe. Turning off gas range. Putting on, taking off smoke detector. Unscrewing the bulb that's off;

חסרון כיס Chesron Kis: Various Merchandise Which One Sells During the Week;