If you train jiu jitsu four or five times a week like I do, you already know the truth nobody likes to say out loud: gear stinks. You start noticing it on your training partners, and if you are honest, sometimes on your own rashguard too. The smell is not a sign you are dirty. It is a sign of how synthetic fabric, sweat, and bacteria interact, and most gear-care guides miss the one step that actually keeps it from coming back.
This is the routine I have dialed in over years of rolling almost every day. No fluff, no laundry science degree required. Just what works.
Why Your Rashguard Smells (Even After You Wash It)
Here is the part that surprises people. Sweat itself is basically odorless. The funk comes from bacteria feeding on the oils and dead skin your body leaves behind during a hard roll.
Rashguards are made from synthetic fabric (ours are a 75% polyester, 25% spandex blend). Synthetics are great for moisture-wicking and stretch, but they have one quirk: they repel water and cling to oil. So when you run a normal wash, the water-based detergent rinses the surface clean while the oil-bound bacteria stay locked deep in the weave. This buildup is what people call permastink.
Then you train again. Your body heat and sweat wake those bacteria right back up, and the smell returns mid-session like it never left. That is why a rashguard can come out of the laundry smelling fine and reek twenty minutes into your warm-up.
The goal of a good wash routine is simple: break down the oils, not just rinse the fabric.
My Exact Wash Routine (Tested 5x a Week)
This is the real version, not the textbook one:
- Wash it immediately, or the next day at the latest. The longer sweat sits, the deeper the bacteria sets in. I get my gear out of my bag the second I get home.
- Always use cold water. Hot water can break down the elastic fibers and actually lock odors in. Cold protects the stretch and the fit.
- Turn it inside out. The inside is where all the sweat and oil collects, so that is the side that needs the detergent.
- Use a quality detergent. I run Tide Hygienic Clean pods. They are built to cut through the gunk that regular detergent skates over.
- Add an odor-killing booster. This is the step most people skip. More on it below.
- Hang dry whenever possible. Air drying is gentler on the fabric and lets it breathe out completely.
That is it. Nothing complicated. The difference is in being consistent and using the right products. If you are shopping for one that holds up, these are our BJJ rashguards.
The Trick Most Blogs Completely Miss
Here is my hot take, and the thing almost every other rashguard care article leaves out.
Everyone tells you to do a separate vinegar soak. That works, but it is a chore, and most people will not do it after every session. What they do not tell you is that there are products that do the same job inside your regular wash cycle, no extra step required:
- Downy Rinse and Refresh added to your wash
- OxiClean Odor Blast
Both of these essentially work the way vinegar does. They break down the residue and neutralize the odor while you are already washing, so you get the smell out without an extra soak. This is what keeps my gear fresh even on a five-day training week. No more stinky rashguard fresh out of the laundry.
If you take one thing from this whole post, take that.
What To Do When It Still Smells After Washing
Sometimes a rashguard gets so set in that even a good wash will not fully clear it. When that happens, here is my go-to fix:
- Soak it in a vinegar and cold water solution for a few hours, then wash it again as normal. The acetic acid in the vinegar cuts through the oil-bound bacteria that detergent could not reach.
I also run a preventative deep clean: once every three months I soak all my gear in vinegar before washing. Think of it as a reset that strips out any buildup before it becomes permanent. If you train a lot, put a reminder in your phone.
The One Mistake That Ruins Rashguards
If I had to name the single biggest reason people end up with gear they have to throw out, it is this: leaving sweaty gear unwashed for too long.
Tossing your rashguard in a corner, or worse, leaving it balled up in your gym bag for days, gives bacteria the perfect warm, damp environment to dig in permanently. Once it sets that deep, no wash fully saves it. Wash early, wash often, and you avoid the problem entirely.
Drying and Storage: Quick Rules
- Hang dry is best. It protects the elastic and the fit and lets the fabric fully air out.
- No time or patience? Use the dryer on the lowest heat setting. High heat is what kills the stretch.
- Empty your bag the moment class ends. Do not let damp gear sit and stew.
Does the Rashguard Itself Make a Difference?
Yes. A cheap, poorly made rashguard with a loose, low-grade weave will trap odor faster and hold onto it harder, no matter how well you wash it.
A good rashguard is built from a quality moisture-wicking blend that pulls sweat away instead of letting it pool in the fabric. We hear this from our own customers all the time: they tell us our gear does not trap the smell the way other brands do, and that it stays comfortable through hard training. You can see the full range of Sente rashguards here.
The Fresh Gear Checklist
- Wash same day or next day, never let it sit
- Cold water only
- Turn it inside out
- Quality detergent (Tide Hygienic pods)
- Add Downy Rinse and Refresh or OxiClean Odor Blast every wash
- Hang dry, or dryer on lowest heat
- Vinegar soak as needed, plus a deep soak every three months
- Empty your bag the second class ends
Final Word
Smelly gear is not a hygiene problem, it is a habit problem. Get your rashguard washed early, use the right in-wash boosters, and air it out properly, and you will never be that person at the gym again. The system above takes almost no extra effort once it becomes routine, and it adds years to the life of your gear.
If you are ready to upgrade to a rashguard that breathes well and does not hold the funk, take a look at our collection. We ship fast across Canada.
Frequently Asked Questions
How often should I wash my BJJ rashguard?
Every single time you train. Synthetic fabric holds bacteria, and reusing a rashguard without washing it lets the smell set deeper and spreads bacteria to your training partners.
Why does my rashguard still smell after washing?
Because regular detergent rinses the surface but does not break down the oils trapped deep in synthetic fibers. Add an odor booster like Downy Rinse and Refresh or OxiClean Odor Blast to your wash, or do a vinegar soak before washing.
Can I put my rashguard in the dryer?
You can, but use the lowest heat setting. High heat breaks down the elastic and ruins the fit over time. Hang drying is always the safer choice.
Does vinegar damage a rashguard?
No. A vinegar and cold water soak is safe for the polyester-spandex blend and is one of the most effective ways to strip out set-in odor.