Is one allowed to wash for challah if on their hands are printed numbers, pictures, letters.
Understanding When One May Bite Off or Pull Off Part of Their Nail. What Should One Do When Needing to Remove Dead Skin?;
Questions About Causing Oneself to Bleed on Shabbos (Part 2);
(Squeezing materials.) two very important pointers to keep in mind when using pre-cut paper towels, napkins, rags, etc.