What is sample stickiness?

Stickiness is an unspecific interaction between the protein/proteins with surfaces.  The stickiness of biomolecules is influenced by various factors, including the presence of specific binding sites, electrostatic interactions, van der Waals forces, and hydrophobic interactions. Knowing the stickiness of your sample gives you the chance to be fully aware about interactions between your protein and different materials that will lead to downstream errors and misinterpretations of your data. Read more here.