We have a room to pump in the office and i have a colleague who has recently started to pump too. On a few occasions I saw that there are some dried milk residue on the table, im not sure was it hers or mine and I'll just clean it. But this morning when i went in & saw dried residue again im certain its hers because she pumps before me. What should i do? Continue to clean it, or let her know? Im afraid that bringing it up will only be very awkward.. and maybe she might thought its my residue? Lol