Hard to clean - stopped working over time

This bottle warmer worked great in the beginning but it was really difficult to clean the water chamber. Eventually you could see the mould residue accumulate and calcium build up within the bottle warmer.

I am a fan of dr browns products, and continue to use their bottles for my baby. i brought this warmer awhile back from transitioning my baby from formula to homo milk and wanted to warm his milk. the warmer is a little pricey compared to the warmers on the market but i thought the design is pretty cool and all the functions is awesome. i like the timer and auto shut off. however, i realized it was very hard to clean and take apart. and the warmer only takes standard size bottles, which is not a real problem for me because i only use dr browns standard size bottles.