Hi Both
Firstly just to set the record straight one step is not ionised water, it is a detergent free phosphate based chemical tha uses micro splitting technology, as does Solution.
Hatem it could indeed be that during the initial treatment of the caqrpet you are disturbing the particulate matter into the air and this is causing the irritation problem, there is a new chemical system that eliminates the air allergens form carpet and textiles, it is available from ourselves. I would be happy to explain, give me a call when you have time
Best regards Nick