Your inflatable structure has an air leak.
This may come from a hole in the inflatable structure or from a welding defect.
Once the leak is found, please use the repair kit provided with the spa by sticking a patch on the leak area, then let it dry for 24 hours.
If the problem is not solved, you should replace the inflatable structure. Please follow the following procedure:
In case your product is out of warranty (more than 2 years), fill out the form (available here).
If your product is still under warranty (less than 2 years), fill out the form (available here), with your purchase invoice and a photo of the problem attached.
ATTENTION: If during the repair, the problem is solved with the manipulations described above, we will be obliged to charge you the labour and the costs of redirection at the price of 89 Euros.