Good that you are being cautious and realise the potential danger, be very careful, OHs tend to have a nose for something being different and remain suspicious for a very long time. If in doubt stop punting for a bit. On the other hand your new routine will present new opportunities for punting.
Personally I never punt and return home straight after, it risks too many tells that I've doing the dirty. I punt morning or lunch time which give me a chance to return to normality before presenting myself to Mrs CBP. She once picked up on a new shower gel scent that I'd used hours earlier, made a good excuse but it served as a warning never to fall into that trap again, she bought the excuse the first time but I'd have problems if it occurred again.