Can I do that on an Infrared Heat gas grill w/ceramic plates? I don't want to have to take anything apart because I'd probably break something
Sometimes mine is lit and then Whoosh! and then that side doesn't heat up right again before I'm done grilling.
Whoosh? You too? That Pet Shop Boys character gets around.
My undergrill is metal with ceramic briquetes (

) and I do ok. I'm sure your grills would lift off easy. I'd guess the 'radiator' that the gas heats up (if that's what you mean by ceramic plates) would lift out for cleaning too, unless it's dead flat and easy to clean in place. Be aware of your PSIs if you have a kick ass pressure washer and are hitting ceramics tho. Maybe keep them on a solid surface to stop them cracking. My electric domestic style is pretty wimpy compared to big motor driven units so never had any problems on the bbq, vehicle tyres, etc.
TA probably had the right idea. If your flame spreader is whooshing hit it with a fine wire brush, maybe even a pick of some sort for the holes if there's junk burned in there and see how you do. Tbh you could probably pick up new flame spreaders pretty cheap if cleaning them looks like an impossible job.
I'm not much of a grill meister. Hope this isn't crappy advice!