all it takes in the orfice is a piece of spider web. I've had the oven and fridge orfice look completely clear, but still restrictive until I blew compressed air through the orfice, then everything worked fine. gas pressure is only 0.5 (yes 1/2psi). it doesn't take much to restrict flow with that low of pressure.
BTW if the stove burners work fine, then you have adequate pressure from the regulator.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!