No pest strips during flower

ive been battling spider mites for some time now, and used neem oil, dr doom fogger and sprays, and both work for a little but they keep coming back. ive also used no pest strips and they seem to work the best, but ive only used them during veg before. i have a perpetual harvest going so my flower room has plants that are about a month ahead of the others. i want to put a no pest strip in there after i harvest but the other plants will only have 4 or 5 more weeks before they get harvested too. i was wondering if anybody knew how long into flower it is ok to use these, because ive heard everything from up to 2 weeks before harvest to not using them in flower at all. if anyone knows how long into flower they can be used and be safe, thank you in advance

I used a hot shot pest strip 3 weeks into flower for 1 week and my smoke came out fine,Iv read that people have gotten sick from them,I would only use it for a week and not the week before harvest.I think your best bet is to find out where they are comeing from and attack them there or maybe try one of those bug bombs,there tough to get rid of. good luck