Multi-choice problem: Choose from the options at the end, and answer how do you do this: Disinfecting your sponges

Possible answers:
+ Dampen your sponges with ketchup and then place them in your blender for 90 seconds on full power..
+ Dampen your sponges with water and then place them in your microwave oven for 90 seconds on full power..
Dampen your sponges with water and then place them in your microwave oven for 90 seconds on full power.