My compost is in a container but not a spin one like yours, but a container that sits on the ground and I put the stuff in through the lid on the top. Honestly I do nothing. I barely remember to add greens or browns.
When you got it was it thoroughly cleaned or were there renmants inside? Wondering if anything from the previous owner could be causing something?
I admit I don't know much about composting since we've been lucky and haven't had any issues...