Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to get stains out of white mugs [title] Scrub with baking soda. [step] Make a thick paste of baking soda and a little bit of water. Apply this to the stains and then scrub with a scrub brush or sponge.

Ending1: The paste will lift any excess food residue off of the mugs. Once it's mostly scrub away from the mugs. Ending2: [substeps] Rinse the paste off the mug and repeat if necessary. A new coat of paste should get deeper into the stains. Ending3: Wiping away the paste with a towel gets the same effect as scrubbing old stains off white mugs. [substeps] If you're concerned that the stain may have gone deeper than you intend, mix a tiny bit of water into your paste. Ending4: A stain should be gone at least two days after washing. [substeps] In a bowl, stir together equal parts baking soda and water.

Answer format: ending1/ending2/ending3/ending4