IV Spikes Ahead of F&O Expiry - A Revisit

I've been observing IV spikes around F&O expiry for a while now and I think I've identified a pattern. It seems that IV tends to spike more in certain expiry weeks compared to others. I'd love to hear from others if they've noticed this as well. Is it possible that market makers are playing a bigger role in IV movement during these weeks? I've noticed that IV spikes are often accompanied by a change in NIFTY's underlying trend. Perhaps we can analyze this further and come up with a strategy to profit from it.