(Squeezing materials.) using Toothbrushes on Shabbos;
Is There a Problem with Flowing Liquids and Reference to Memchaik? (e.g., Baby Oil, Sanitizers, Liquid Hand Creams, Vitamin E Oil, etc.);
Understanding the Concept of טירחא יתירה (Excessive Tircha, Major Exertion) on Shabbos;