What are some killer subject lines for abandoned cart emails that actually get opened?

Look, I'm going to be brutally honest. My abandoned cart rates are killing my profitability. I'm spending good money on ads to get people to my Shopify store, they're adding products to their cart, and then... nothing. Poof. Gone. I've tried generic 'Don't forget...' emails, but my open rates are embarrassingly low—like 12-15%. I know these potential customers are interested; they've already shown intent by selecting products. But how do I craft a subject line that doesn't feel desperate or spammy? I need something that cuts through the noise, creates urgency, and makes them actually want to complete their purchase. I'm not just looking for clever wordplay—I need a strategic approach that turns these abandoned carts into actual revenue. My margins are tight, and every lost sale hurts. I need subject lines that feel personal, create genuine excitement, and make customers feel like they're missing out on something special.