Hoover Freedom Stick FD22RA - Charger Warmth and Indicator Lights; Charger Gets Warm; Charging Indicator Flashes Blue and Red

Pictures (left) showing how to remove the brush roll for cleaning
Charger gets warm
This is normal
It is normal for the charger to feel warm when connected to the product and charging it.
Charging indicator light flashes blue and red
Reset the battery by removing it.