Raw veggies: Tomatoes, cabbage, baby corns, cheese, onions, potatoes, and eggs.
If these vegetables aren't showing visible signs of staleness then wash them under fresh water for sometime and then smell it. If they still smell rotten then put them away or else they are good to use.
Tomatoes: Usually rotten tomatoes are easier to spot, and if you notice watery substance all over it or the skin has gulped inside out, it means they must be put away. But if their skin comes back to its usually shape after a slightly squeeze without spilling pulp it means tomatoes are edible.
Cabbage: Unless you notice worms around their leaves, you must get afraid of using cabbage. Try dipping it in fresh cold water & salt for sometime and then run it under warm water. But this won't work if the product is being used months beyond its best-before date.
Cheese: Normally cheese gives away a stale look from the outside at first but you must pluck the portion out wash it with fresh cold water and them smell it if the staleness still persists then throw it away.
