It apparently costs up to $1,700 per piece of gum left behind.

By Benjamin Snyder / Fortune
Updated: January 24, 2017
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A low-cost Russian airline just announced a ban on chewing gum. The reason? The cost to clean it up from inside its airplanes is just way too much.

The airline, Pobeda, says that cleaning up gum left behind by passengers costs up to $1,700 per piece, the BBC reported. “We have imposed a ban on chewing gum since the middle of June due to losses sustained by the airline,” according to a Pobeda spokeswoman to the publication.

And that’s not all the airline has to complain about either, apparently. Passengers are also reportedly stealing equipment from the plans, including life jackets.

This article originally appeared on Fortune.

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