This article has been posted before. It mainly addresses problem feeders and includes some ideas on changing up the habitat.

https://jkrballstreetjournal.com/201...n-eating-again.

I don't think adding scents would enrich the habitat and are more likely to irritate the BP; there is nothing like that in their natural surroundings. Citrus fruits could be really bad, they are highly acidic.

For enrichment I provide various textures for it to move on or around - a small flat piece of rock (slate), a cork flat that is similar to bark, a branch, and a few different vines that are slightly re-arranged after the monthly cleaning.