Lower the profit rate. Igloo doesn't have that many high profitable items.
Something between 3k and 5k. You will still be able to buy items that with a +10k profit. (I get one or two every 10 restocks)
Personally I don't go over 5k profit, because I want fast buys (I use multiple accounts, thus the faster I buy = more accounts I can use). And since items there are bought, almost every time, for less than 1k, the profit is huge.
Yeah, I'm already neorich as it is so I don't bother with small items.
I didn't do anything, I simply waited a while before starting the Igloo again. After nearly 2 days without anything, I suddenly got my 10 items within 5 hours and three were UB.