stained

Have used this several times with good results This weekend the can started foaming part way through - hoped foam would then dry ok bit has dried white staining good badly Tried nail brush and washing also hoovering when dry no luck - phoned merc and they have offered to collect car and clean...

hello my seats appear to have water stains on them they are grey fabric - apart from paying a valeter £100 or so is there any home brew/halfords stuff that really work? cheers