Is One Allowed to Step on Any Type of Liquids Released While Coughing or Sneezing (e.g., Saliva, etc.)?;
Introduction to the melacha. Part 1;
understanding the two views with "דרך לכלוך" (coloring destructively). (Wiping one's hands on a towel from grape juice, blood, pomegranate, colored ices, etc.);