Help needed to identify what eats phal leave.
Today in the morning i noticed syrup like drops on one of the phal (on both sides)
Name: eaten leaf2.jpg Views: 271 Size: 158.2 KB
Than looking at the leave in bright light i revealed this
Name: eaten leaf1.jpg Views: 257 Size: 158.9 KB

Syrup like drops do not correspond to the eaten pattern.

In my other post PaphMadMan said it could be aphids. I looked for any type of insects to be present but did not find any.

What could it be and how to treat from it?