What's the industry standard for recovery email timing?

As an e-commerce store owner, I've been wrestling with cart abandonment for months. Every time I see a potential customer add items to their cart and then disappear, it feels like money literally walking away. I've heard about recovery emails, but I'm not sure about the perfect timing. Is it too soon if I email them immediately? Will I seem desperate? But if I wait too long, won't they forget about their cart entirely? My team keeps pushing me to optimize our recovery strategy, and I know cart abandonment is costing us serious revenue. We're running Meta ads with decent traffic, but our conversion rates are frustratingly low. I've tried generic 'come back' emails, but they feel impersonal. I want a strategy that feels genuine, creates urgency, and actually speaks to why the customer might have hesitated in the first place. The stakes are high—every recovered cart is essentially free revenue. But getting the timing and messaging right seems like a delicate art that requires more than just a one-size-fits-all approach. I need a nuanced strategy that respects the customer's journey while still being assertive enough to drive them back to complete their purchase.