I read this as pisang. Knife makes way more sense than banana. I thought it was follow on from the sleeping banana.
hahaha....yes...the sleeping banana....This knife is not clean, it shouldn't be used on that sleeping banana.
In case anybody is interested, to complete the cutlery set (as 'knife' is only taught in this lesson)…
garpu = fork
sendok = spoon
Could this also mean "this knife doesn't clean"?