For the stainless reels, ignore the spring clip, wrap a short length of inch wide masking tape around the centre (in the light, of course) leaving just enough to tack the start of the film to. Use a good quality tape, or it'll come unstuck in the processing, and Sod's law states that the best frames will always be the ones that work out of the spiral and get scratched.(posted 9014 days ago)And a little tip that might help with the plastic reels.
Get them really dry, and then rub a small amount of Silicone grease (which is chemically inert)into the spirals. Wipe it almost all off again, so that there's hardly any visible sign of it. This really reduces the friction, and for the next few loadings your films will glide in. Renew the grease when loading gets sticky again. If you can't get silicone grease, try a waxy silicone furniture polish, NOT WD40!
Wishing you peace and moderate language,