How do I recover high-risk order abandonment?

I've been watching my store's analytics, and it's driving me crazy. Every single day, I see potential customers who add products to their cart but then mysteriously disappear. These aren't just random browsers—these are people who showed genuine interest, spent time exploring my products, and were inches away from completing a purchase. My team and I have tried traditional retargeting ads, abandoned cart emails, and even manual follow-ups, but our recovery rate remains frustratingly low. The real kicker? These abandoned orders represent thousands of dollars in potential revenue that's just slipping through our fingers. I know these customers are interested—they've already demonstrated intent by adding items to their cart. But something is stopping them: maybe it's unexpected shipping costs, hesitation about the final price, or just a momentary distraction. Whatever it is, I need a systematic, intelligent way to convert these high-risk, almost-customers into actual sales. I can't keep losing revenue because of last-minute purchase hesitation. There has to be a smarter, more targeted approach to recovering these abandoned orders without feeling pushy or desperate.