It is a deodorizer/disinfectant and in this aspect, it delivers very good results. Besides the helmet, I also use it on boots/gloves (1 spray) and jacket (2-3 sprays) with equally good results in odor management. It is not for removing grime and stains. For those, you either need to wash or use some foam. Even though I don't use it only on the helmet, it lasts a long time.

I have been using it for 2 years, I would say. Once a day I spray the helmet (when I take the last ride of the day) and it's just fine. I don't know how effective it is compared to, say, some foam. But it seems to clean and smells nice.

It leaves a pleasant scent inside the helmet, I just don’t know how well it cleans as I don’t see the paper getting dirty after spraying. With similar products I have tried, I noticed a difference.

So far, I have used the cleaning product first from IPON, then I got the other one from Motorex, and recently I tried this one. It has a nice scent, but its strong point compared to the aforementioned ones is the quantity because it lasts quite a bit longer.

Very good product with a very nice scent.
First use: 2-3 times and every two days the first week spray and leave it on all night. After that once a week or once every two weeks if you prefer.
I got it for a bicycle helmet.

Price is a bit high for the job it does.....ok it doesn't clean the helmet 100% it just removes the strong smells from sweat....in the summer it needs more frequent use compared to winter

A few sprays inside my helmet and it refreshed it, making it feel like new. Nice scent and definitely the right disinfection for the helmet, especially in the summer.

Very good, it smells cleanliness. I wish I had discovered it earlier and didn't need to put on and take off cushions.

It does the job, leaving a pleasant scent and freshness inside the helmet that lasts for a long time. Personally, I simply spray it and let it sit for at least two hours

I have bought it for about 1 month. I have used it 2 times. I spray the helmet everywhere inside at night and let it dry until morning and it's ready. It eliminates unpleasant odors and sanitizes the helmet lining. It does what it says.

After using foam as a cleaner, I tried this product and with frequent use, as mentioned before, it does a very good job on the helmet, leaving a fresh scent, I would say. After spraying it on a dirtier surface, I rub it with a soft cloth to clean it. It definitely doesn't clean grease as well as foam if it stays for a long time, but with frequent use, it prevents it from settling. The term "frequent use" for cleaning depends on each person, some have oilier skin and others don't. If you haven't cleaned your helmet in a while, clean it carefully with a sponge and soap, and then apply this frequently from the evening. I recommend it as an alternative to foam!

Before, I used foam to clean the inside of the helmet. Due to the lack of the product, I bought this one. My opinion is that it doesn't clean the interior, but simply maintains it. Greasy marks that existed continued to exist after its use. On the contrary, the foam I used would "inflate" those areas - and because I cleaned it with a cloth afterwards - it removed the grease. It does the job for maintaining the interior between cleanings.

It does the job, from the beginning with a few sprays I saw a difference (I should have bought it a while ago)

It does remove the helmet's odors from sweat, etc., but it adds another odor, which comes from the cleaner. It's not unbearable, but it's not very pleasant either.

Already from the first application, with 3-4 sprays at night, there is a huge difference in the morning!
I will continue with the same application every night and I will come back.

Update.
After 4 months of use, I am coming back.
The product is A M A Z I N G!
In the summer, 3 sprays at night are enough. In the winter, 2 sprays, even every other day, will do the job.
Note: Prefer to spray the helmet at night, so that it smells only freshness in the morning.
Bonus tip:
Use it on gloves that cannot be washed, do not have good breathability, and smell bad. It takes 1 spray per glove, every night. If they smell too much, it will take a few days for the smell to go away.