Sponge for washing dishes should be changed at least once a week. Even if you thoroughly wash it after use with soda, vinegar or other remedies.
All these procedures cannot completely destroy a huge number of bacteria that can accumulate in a sponge during use. In fact, no more than 60% are destroyed.
If you can not force yourself to throw the dish sponge, cut it off the corner and do not use it to wash the dishes.
Why do this? Just to not get confused and do not start again to wash the dishes.
A sponge with a cut off corner will remain in the household, but you will no longer wash it with dishes, wipe the stove or countertop. It will serve other purposes.
A cut-off corner is a distinctive sign that all family members will know about.
Store such a sponge under the sink and use it when you need to wipe the trash can, toilet bowl, wheelchair wheels or bicycle wheels or dirty boots. In this case, the sponge is no longer a pity to throw, because it will serve 100%.