If your Big Green Egg isn’t heating up like it should, takes forever to get to temp, or starts smoldering instead of burning clean… there’s a good chance it just needs a cleaning.
Today I wanted to show exactly how I clean my Big Green Egg before a brisket cook and explain why keeping the airflow clear is one of the most important things you can do for consistent cooks.
Now, this isn’t a full rebuild or anything crazy complicated. Most of the time, you only need a quick clean between cooks. But every once in a while, especially before a longer cook like brisket, it’s a good idea to do a deeper cleaning.
Start By Removing The Components
The first thing I do is pull everything out of the Egg:
- Cooking grate
- Heat deflector
- Charcoal pieces
- Internal ceramic pieces
I had mine set up a certain way because I had recently been cooking pizzas, but for brisket or chicken I flip things around differently to allow better airflow between the grate and the food.
One thing I love about the Big Green Egg is how reusable the charcoal is. After a cook, you simply shut the vents and choke the fire out. Most of those leftover chunks can be reused on your next cook.
Clean Out The Ashes
This is the biggest thing that affects airflow.
On the bottom of the Egg, there’s an opening where you adjust airflow. Behind that is where ash builds up over time.
Using an ash tool or scraper, clean out as much ash as possible.
Even if you don’t do a full deep clean every cook, you should at least remove the ashes regularly because:
- Ash blocks airflow
- Poor airflow causes temperature problems
- Your charcoal won’t burn as efficiently
If your Egg struggles to get hot, this is usually the first thing to check.
Check The Air Holes Carefully
Once I remove the charcoal and ceramic pieces, I inspect all the airflow holes inside the firebox.
This is extremely important.
If those holes get blocked with ash or tiny charcoal pieces, your Egg won’t get proper oxygen flow.
I usually:
- Knock loose dust downward
- Scrape out the bottom
- Clear each hole individually
Smaller charcoal pieces can actually restrict airflow over time, so removing them occasionally helps the fire burn cleaner and stronger.
Do A Deep Clean Occasionally
For small cooks like burgers or chicken, you probably don’t need to go super detailed every time.
But before a long cook like brisket, I like to go deeper and remove:
- Hidden ash underneath components
- Dust buildup
- Small charcoal fragments
Once I removed the inner pieces, there was still hidden ash underneath that I couldn’t reach earlier.
That extra cleaning helps the Egg breathe properly during long low-and-slow cooks.
Make Sure The Firebox Is Lined Up Correctly
This is one mistake I learned the hard way.
When putting the Egg back together, make sure the opening in the firebox lines up with the bottom airflow vent.
If it’s turned the wrong direction:
- airflow gets blocked
- temperature control won’t work correctly
- the Egg won’t heat properly
I actually forgot this once and couldn’t figure out why the Egg wouldn’t perform right.
Reload The Charcoal Properly
When reloading charcoal, I like to:
- Put the larger chunks on the bottom
- Add medium pieces on top
- Mix things around for even airflow
For this cook, I was preparing for a brisket flat, so I added a fresh large chunk along with the reused charcoal.
Then I used a single fire starter to get things going.
Open The Vents Fully While Heating Up
One important step:
When lighting the Egg, make sure:
- the bottom vent is open
- the top vent is fully open
This allows maximum airflow while the charcoal gets established.
Once the fire is burning strong and the Egg starts approaching your target temp, you can begin adjusting the vents.
Final Thoughts
Cleaning your Big Green Egg doesn’t have to be complicated.
Most of the time:
- remove the ashes
- keep the airflow holes clear
- clean out small charcoal buildup
That alone will solve most temperature and airflow problems.
Then, every once in a while, especially before a long brisket cook, take a little extra time and do a deeper cleaning.
A clean Egg cooks better.
And honestly, airflow is everything when it comes to charcoal cooking.