Its only my opinion but if all you clean with is stuff anyone can get from Tesco your not offrering anything differant that what the custy can do. as for bleach sprays you have got to be very carefull as these can leave streaks if it is allowed to run. for example cuboard fronts etc
there is some usefull things in Tescos but your kit needs to be more proffesional, but its only my oppinion.
I use proffesional strenght products from Johnson Diversey and others, I have tried everything and I allways come back to quality products, the finish is better and dwell times are shorter thus cleaning is quicker.
hope this helps kind regards Phil.