It’s not just the spilled food/drink, it’s the seat looks disgusting, like it hasn’t ever been washed at all, or at least they should use seat types that are easier to clean (such as plastic). The floor looks absolutely disgusting too, like it hasn’t been cleaned at all either (and this is not including the spilled food). I remember in Austin getting on the bus that often the floor is sticky, like the bus never get cleaned. In Taiwan the bus gets cleaned at the end of each run (more so because of the coronavirus).