THE GATEWAY / ARRIS XB6-T WIRELESS MODEM, ROUTER, WITH VOIP TELEPHONE JACKS MAKES NOISE WHEN IT COLLECTS TOO MUCH DUST AT THE BOTTOM

MANY OF YOU HAVE THE XFINITY, COMCAST, ARRIS XB6-T WIRELESS MODEM, ROUTER SINCE 2018.  This unit replaced the MOTOROLA TOWER which we all liked because it looked powerful and had lots of lights. The XB6-T with the odd shaped rectangle narrower on top and wide at bottom black or white is a fine product. At times you will hear a louder than usual HUMMING NOISE. This is the COOLING FAN. After a year or so in your house it will begin to COLLECT LOTS OF DUST. That is causing the louder than usual HUMMING NOISE. You have 2 options. Call COMCAST/XFINITY and clean and replace it. Or try to VACUUM IT at the bottom. I took option #2. It was getting very warm. Late a night when I was not using the internet I unplugged the power cord at the unit. I then carefully vacuumed the botton with a small low powered vacuum that I use for my sensitive electronics equipment. It is strong but not overly powerful. I vacuumed the bottom. I then re-attached the power cord. The noise stopped. The unit ran much cooler. It was NOT IMMEDIATE. It took another 15 minutes for the unit to cool down and run quiet.