How do I make timers non-intrusive?

As an e-commerce store owner, I'm struggling with creating countdown timers that drive urgency without annoying my customers. My current timers feel too aggressive and disruptive, which I worry might actually drive potential buyers away instead of encouraging them to complete their purchase. I need a strategy to design timers that feel helpful and motivational rather than pushy or spammy, ensuring they enhance the user experience while still creating a sense of genuine urgency.