I have a double bathroom lavatory sink in the upstairs bathroom. One sink (faucet) works well; the other does not. It is the hot water faucet that doesn't have any power. Since its installation it has always been somewhat slow... but recently it is even slower.
The faucet is the Glacier bay 2 handle lavatory faucet model 67092-6601/6602/6105.
What can I do to improve the water pressure? Do I need to clean something? How? Is there a way to do it without taking the whole unit apart from underneath the sink? Is there a simple method?
Thank you.

Glacier bay faucets and parts are carried by Home depot, here is what you need to do close the angle valve under the sink, remove the handle and the cartridge, put a towel on top of the opening, turn on the water for a few seconds to flush out the debris out of the hot port of the faucet, clean the cartridge install and check if flows good, if not remove the cartridge take to your local home depot and get a new one, good luck.
John

Glacier bay faucets and parts are carried by Home depot, here is what you need to do close the angle valve under the sink, remove the handle and the cartridge, put a towel on top of the opening, turn on the water for a few seconds to flush out the debris out of the hot port of the faucet, clean the cartridge install and check if flows good, if not remove the cartridge take to your local home depot and get a new one, good luck.
John

Thank you for your response. I did what you suggested and it works better. The hot water still comes out with less pressure than than the cold, but it flows better... like when it was originally installed (by me).
By the way, the angle valve didn't seem to do anything... I turned left; I turned right... ultimately, I went to the basement and shut the whole house water.

What could be the problem with the angle valve? It worked when I put the faucets in... this time it didn't do a thing.

Sounds like you have problem with your angle valve, you have to shut off water to the house, disconnect the supply line at the faucet place the open end in a bucket get some help to open the shut off valve for a few seconds and see the flow if good flow your problem is with the faucet if water flow still slow then problem is with the angle valve.
To fix the angle valve keep the shut off valve closed remove the packing nut on the angle valve see the image below, check stem and the washer for any damage, you may need a new washer or new angle valve, good luck.

John