You’re gonna have to be more proactive in prompting them to use Wises. The opportunities to do so are incredibly abundant, if you can recognize them. Any time a player asks for a detail or bit of information on an NPC, location, item, etc, prompt them, “Why don’t you roll [appropriate]-wise to determine that?” 9 outta 10 times, they won’t have that Wise, but that’s what Beginner’s Luck is for!
But there’s actually two ways to engage Wises. The first is as above. When the PC asks for info and it’s not a Say Yes moment, have them roll a wise. Some examples:
GM: You come across an orc encampment, red and black banners raised above the tents.
PC: What clan do they belong to?
GM: Roll your Orc-wise! Pass and you’ll know that they belong to the clan Warsong, whose lands are just beyond the mountains to the east. They don’t belong here. But fail and you’ll believe they belong to the clan Openfist. Your liege has a peace treaty with them and they should welcome you with open arms!
GM: The walls of the fortress are thick and high, patrolled regularly. Getting inside seems very difficult!
PC: Are there any hidden ways in?
GM: Roll your Fortress-wise. Succeed and know that most castles in this region depend on natural springs for their water. You may be able to crawl through one and get inside. Also, the castle routinely receives shipments of supplies by caravan. If you can join one, you might pass through the gate unnoticed. But fail and you’ll still know these, but crawling through the springs ends up in a well that sealed with an iron grate at the top. Or the caravan requires membership in a guild that could be a very high Resource test to join.
Now, the second method is more for the experience BW player. In this situation, the PC authors a piece of fiction and the wise is tested to see if it’s true (as long as it doesn’t affect any existing details (known or unknown by the PCs) established by the GM.
PC: I really want to get the Bishop to denounce the Mayor, but I know the Bishop wants to remain neutral. Hrm… maybe I can blackmail him? He must have an illegitimate child who he’s been hiding?
GM: Oh! That’s certainly a possibility. Roll Bishop-wise or Rumor-wise! Succeed and you’ll discover that he does indeed have a child. But fail and that child will be an adopted nephew, whose parents were heroes who sacrificed their lives to destroy a demon.
PC: Huzzah! Now that the dragon is defeated, I want to search his treasure for some magicked armor - a suit of Mithril made for a person my size!
GM: Sure, there could be anything in this hoard. Roll your Loot-wise. Succeed and the armor is yours. Fail and you open a trapped chest while searching, possibly be poisoned, and you’ll not find the armor.
Again, view any open question from a player as an opportunity to prompt a wise test. In my own experience, this has led to some excellent wises: Loot-wise, Evil Overlord-wise, Gold Coast-wise, Navy-wise, et al. You’ll see setting-specific wises open and advance very quickly, making that setting deeper and richer with each test.