Only give it 5-10 mins. I have pre sprayed and two mins later started cleaning still got great results. 5-10 (max) mins is good if time allows.
If domestic, I'll spray up two rooms at a time ( i use the electric sprayers) sick of pumping, and I don't mean that rude, then start cleaning a few mins later.
Commercial work, if i have got (say) 7000 sqft I will get someone (after hoovering) to pre spray, once they have done 10 mins of spraying I'll start cleaning.