A. Quality made air gaps are pretty basic products that rarely go "bad". If you purchased your airgap from us you can rest assured that it is a quality airgap. IF your air gap didn't spit in the past then
try running your garbage disposer for a few minutes. Basically the way your dishwasher airgap works is that water is pumped through the smaller side of the airgap (5/8") into the airgap and then gravity takes it to your sink (or disposer)
with larger hose (7/8"). The larger size has an area of about twice as large and with gravity there normally isn't any problem. If the 7/8" hose is sagging or there is grease build up or a partial stoppage or blockage in your sink/disposer
the airgap can "spit." After inspecting under the sink to make sure the 7/8" hose isn't kinked or going uphill at all (it has to go smoothly downhill all the way) then disconnect the 7/8" hose at the sink/disposer and point it into
a large bucket. Then run the dishwasher and see if the airgap still spits. If it does then you know you need a new airgap and if it doesn't then you know the "problem" is after the hose.