Your kids are continuously playing with their toys. For your kids nothing really matters more than their toys and throughout the day, they tend to have a lot of fun with these toys. Now, you need to take a lot of care when it comes to toys, since they are often a mediator when it comes to diseases related to infections and bacteria.
Your kids are in direct contact with toys and put them inside their mouth, so to ensure that they remain safe and you don't have your pangs of paranoia it is necessary for you to clean them. The correct procedure for cleaning these toys would be to put them inside a dishwasher and pour some vinegar into the dishwasher. Once you are done with pouring the vinegar, turn the dishwasher on and see the toys getting back their original color and touch.