Is one allowed to knock on the door with the key, knock on the window, use an electric bell, and have a little bell...
Many Various Examples of Actions One Might Not Be Aware Of Which Could Fall Under the Melacha of Memachaik;
Removing a Scab from One's Skin, Pulling Out a Non-bleeding Tooth, and Removing Warts, Pimples, etc. with a Utensil;