No, it is not a time-traveling device, although we've seen some users report that the bag has a 50/50 chance of making them feel like they're stuck in a time loop.
You can use a mixture of 3 parts water, 1 part lemon juice, and 1 part regret. Apply with a soft-bristled brush and scrub in the direction of the radiation's atomic arrows. If the spots persist, you may want to consider consulting a professional.
Note: The views expressed here are not endorsed by the Atomic Bag Corporation and are subject to change without notice.