In the end, I think these sprays don't do much. This is the 3rd one I've tried (from a different company) and it leaves me with the same impression: for the first 2 days they smell strongly and then the "fresh scent" disappears, and sometimes the smell of mold comes back. Cleaning of the a/c is necessary if you have a serious problem

I used it for the first time according to the instructions for use, in a few minutes the product was finished quickly, it gave a freshness but be careful with the smell because I did not like it from this particular product and also it took more than a month to leave from the car and specifically when I turn on the air conditioning it still smells, but I think it does the job

To release its contents, you press it once and, with the air conditioner on, you leave it with the doors and windows closed. This particular product was sticking and did not release all its contents; instead, it started spraying droplets, soaking the area. Waste of money, the foam from the same company (doktor) is enough.

After 5 days it smells faintly and when the compressor turns off, that musty smell starts to come back again. With another slightly more expensive product, this issue did not exist for about a year. In no case does it 'clean' the system. But with €7 (another product), it does clean.

The only thing that got rid of the bad smell from the car's air conditioning. Combined with a cabin filter change. Perfect result!

I used it after the disinfection process with K2 foam with heating.
The air conditioning aroma process (lemon scent) was done without the cabin filter, with the air conditioning on full cold and air recirculation active with doors/windows closed. After emptying the spray, I gave it another 5 minutes. Finally, good ventilation and placement of the cabin filter.
The result is amazing, the car smells wonderful and the process is easy and very economical.

The scent it leaves in the car is unique, it just needs good ventilation after use.

It has been in the car for about 20 days and I can say that the smell still lingers, although it has weakened. I wasn't crazy about this particular scent.

Update: In the month, it doesn't smell like anything

It was used after using the same company's cleaner. Pleasant aroma, lasts for a few days. Gives a feeling of freshness. I will definitely prefer it...