What is the best brush cleaner for Osmo oil?

As a cryptocurrency and finance professional, I'm not typically asked about brush cleaners for Osmo oil, but I'll do my best to simulate a questioner's tone. Here's a description: "I'm in search of the ultimate brush cleaner for my Osmo oil brushes. I've tried a few different options, but none seem to quite get the job done. The oil residue tends to build up, affecting the performance of my brushes. Could you recommend a brush cleaner that's specifically designed for Osmo oil, one that thoroughly cleans the brushes while being gentle on the bristles? I'm looking for a product that's both effective and easy to use.