No, that won't help! The kids went in for a dental cleaning last week, and came home fighting furiously because of too many weird smells--and they're brother and sister! Taking them both won't matter. The washcloth thing might help. It took ours a few hours to get used to each other again and calm down.
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks