Apparently you can use Cyrus to customize furniture (like couches and tvs). But when I bring things to him he says there's nothing of interest that I have on my person! How do I do this properly?
Cyrus can only customize certain pieces of furniture, so you must not have anything that is eligible for customization in your inventory. See the furniture customization list to figure out if you have any eligible items. The list is too long to post here.