Remove the aerator screen FIRST and make sure there is no crud clogging the screen. The white plastic disk with the small diameter hole is the flow restrictor. It can be removed to see if it is the problem. If it is, you can carefully enlarge the hole till you get the flow you want.
I juts removed mine and keep it in a plastic bag under the sink. When dry camping, I want the restricted flow for water usage control.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW