Do you know why it is fluctuating so much?
IMO, humidity should be close to constant. I know there are suggested ranges, but sometimes it is too difficult or expensive to correct. I just try to maintain a level throughout the grow. You need to be higher than 30%.
Above all watch the plant 🪴. She will tell you if she is bothered. Each plant is different. You may grow a monster in those conditions today with a certain seed. The next seed may become affected and make you induce adjustments.
It is all a journey. Be flexible, patient, and attentive, and you will do just fine.