How to Clean Coffee Residue From a Thermos

Many need a hot cup of coffee to start the day; however, the morning rush often necessitates taking that cup of coffee on the go in a thermos. Unfortunately, repeated use can leave your thermos stained with a seemingly permanent coffee stain. If your daily coffee ritual is starting to discolor your thermos, it is time for a little maintenance. A simple mixture using ingredients in your pantry will remove coffee stains and prepare your thermos for the next cup.

Use a homemade mixture to rid your thermos of coffee stains.

Step 1

Combine the hot water, vinegar and baking soda in a sink or container large enough to hold the thermos. Submerge the thermos in the water and leave it to soak 15 to 20 minutes.

Step 2

Dip the sponge in the water and squeeze out any excess moisture. Remove the thermos from the water and drain it.

Step 3

Wipe away any remaining coffee residue with the sponge. If the residue does not wipe away, soak the thermos another 10 minutes. Repeat until the residue is completely removed.

Step 4

Drain the water from the sink. Thoroughly rinse the thermos until the water runs clear. Wash the thermos as normal.