Your coffee is lukewarm because the cups or the internal infuser are cold.
Fix:
- Preheat your cups before brewing. Rinse them with hot water using the machine's hot water or rinse function.
- If it's been 2-3 minutes since the last coffee was made, warm the infuser by pressing the rinse button before making your next coffee.
Heads up: The machine has a coffee temperature setting you can adjust in the settings menu for future cups.