This is one of the reasons I recommend gel to my customers who purchase desktops.

Don't get me wrong the beads work but this is one of the downsides to using them. I've been using them for years and I'm still not sure sometimes when to refill them.

Oh and to answer your question...be a patient noob and relax. Your beads have to have time to release the stored humidity. If your humi goes for several days without increasing then it might be time to recharge your beads.