I have a year newer model so the spray heads may be the same. My sprayer clogged up shortly after purchasing our unit and to get it apart I unthreaded it from the pull down hose and carefully used a small screwdriver to pry up on the toggle that switches from full flow to sprayer. It just snaps in place on the sprayer head. Then remove the small hex screw located above where the toggle was and the plastic innards will slide out of the chrome or brushed nickel? Outer shell. Then take off the aerator screen. Mine had a small piece of plastic that must have been inside the fresh water system somewhere partially blocking it.
Mine looks like this one
Mark & Karen
2021 3121rl - slide toppers, cottage white, TST 507 TPMS, X-Factors, disc brakes
2021 F-350, 6.7L, SRW CC LB - B&W Companion, Timbren, Bakflip cover