ifix battery keeps unsticking and has lead to a constant rattle

2 weeks ago I replaced the battery on my macbook pro with an ifixit one. The install went good, however the sticky coating seems to have worn off already on both sides. The batteries at the sides are loose and rattle if I shake the laptop. I opened it up and firmly pressed down which kept them stuck for about 24 hours, then they fall down again… How can I keep them stuck for good? (I thoroughly cleaned the area before installing the new battery. Spent a good hour removing all the old crud and stickiness.)

I REALLY don’t want to remove this whole battery since the middle ones are firmly stuck and using the adhesive remover is going to ruin this battery.