What is the goo that gets on suitcases out of the hold and how to remove it?

What is the goo that gets on suitcases out of the hold and how to remove it? - Faceless cook getting out baking tray with delicious filled baked apples of electric oven at home

Many many times my checked luggage comes out from the conveyor belt with black goo on them. It can be just some traces or quite a lot of it. The goo is very sticky and greasy so it ends up dirtying my clothes when I pick up the suitcases. Here is one from today:

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What is that stuff? More importantly, how do I get rid of it effectively?

Wiping, even with a wet towel or paper seems to do very little and scrubbing eventually reduces it but is rather labor intensive, so perhaps I am not doing the right thing. What product should make cleaning this off easier? With what type of implement, sponge, brush, etc?






Pictures about "What is the goo that gets on suitcases out of the hold and how to remove it?"

What is the goo that gets on suitcases out of the hold and how to remove it? - Crop unrecognizable chef removing baking sheet with appetizing stuffed baked apples from electric oven at home
What is the goo that gets on suitcases out of the hold and how to remove it? - Man and woman carrying carton box
What is the goo that gets on suitcases out of the hold and how to remove it? - Asian man helping friend to get up from ground





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Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Tim Douglas, Tim Douglas, Ketut Subiyanto, Allan Mas