Is my skimmer actually working?

[GothFishKeeper]

I currently have my eshopps nano skimmer in the left rear corner of my fluval evo 13.5g, and in the past it has been collecting gunk but I haven’t had to clean it out for a while now. I’m wondering if it is actually picking anything up now that I have a wavemaker flowing towards the opposite end of the tank. Would my skimmer still theoretically be doing it’s job with that considered? Here’s pics of my setup.

 

[GothFishKeeper]

If anyone has suggestions on if I should place my wavemaker somewhere else while also having it flow across the whole tank, please let me know.

 

[FUNGI]

as long as the skimmer is getting filled with water, the wavemaker placement doesn't matter......