I appreciate yankdownunder’s concern about Play-do, but the “cheshash” is so remote that I would not not worry about it.
First- it is pretty clear that whatever edible ingredient may have been added to the playdough, it is “nifsal me-achilas kelev” and is not considered food.
Second, it is not evern clear if whatever is collected from the bottom of the wine caskets comes under the heading of ‘stam jenom”.
Thirdly-even if all of the above is positive, the amount is so infinitesimal that it is bottul beshishim.
Fourthly,any soup spilled is not a kli rishon-because it is either from the plate (kli shlishi) and even if form the pot directly, it is “irui kli rishon’ that is only “mevashel k’dei klipah”.
Lastly, how can a table become treifa anyway? You don’t eat off it and , by the time you put any food on it, it is cold.
So, I thank yankdowunder for his great ‘zehirus’ but this will come under the heading of a “chumro” that is not incumbent upon others to adhere to.