tofu questions.....

I always sniff mine... if it smells fresh/clean then I assume it is good. If it were in my fridge for 5 or 6 days with occasional water changes and smells ok I'd assume it is good.....

However, no one wants to eat something rotten. So, if you aren't sure just toss it - a tub of tofu is pretty cheap and it may not be worth risking it.

In Japan the tofu would have def. gone bad, andyou would KNOW it had gone bad. In the states it seems to last longer.
does it have a sour smell, any faint pink coloring? if you pinch some between your fingers does it leave strings when you pull your fingers apart? What was the expiration date?
Basically I think you will know if it has gone off.
HTH
Kathryn

^
Yeah, I was gonna say when it has a slight pink tinge to it and it is kinda slimy.