What is this on my monstera??

I was away for a few weeks and when I came back, one of the leaves on my monstera had these tiny things. They seem to be eggs of some kind of pest, when I wiped it off with some rubbing alcohol, I could see small black things inside it. The plant itself looks unaffected, all the other leaves are fine but this whole leaf had a few patches of this. can anyone please tell me what this is and how to fight it?

The plant gets watered once every 1-2 weeks when the soil gets dry and gets enough light standing next to the window