1. Unscrew the handle
2. Use the Allen wrench to unscrew the exposed threads sticking out where the handle unscrewed from.
(Your faucet came with an Allen wrench)
3. By unscrewing the threads you will loosen and be able to take apart the round bulbous head of the handle.
4. Just below the handle, by hand, unscrew the base. This will expose the cartridge.
5 With a wrench unscrew the hex nut attached to the cartridge to remove the cartridge from its housing.
6. You can now remove the cartridge to adjust and reseat it into its housing and reassemble.
7. You have two cartridges so you will need to readjust both.