@Bmachine
a Word of caution when using gasoline, consider please what you are buying as gasoline, i have found that gasoline is too much aggresive with almost everything except tough metal parts as springs, suspensión and so on, and in that case it might even damage paint leaving residues that will not allow you to re-paint over it so you will need a solvent later on
gasoline will also damage aluminium creating and accelerating White rust due to the traces of enthanol in its contents, i.e. when cleaning carburetors, be careful with those tiny passages
i would not clean plastics or rubber with pure gasoline, but i would add gasoline to diesel fuel when cleaning those, mixture at your choice but i would say 50% Works just ok
adding a conditioner might be tricky, or better say a mystery, you should consider the purpose of the plastic or rubber
in any case, for cables, better use an engine cleaner that is wáter based (like the one that Luis proposed), this will leave a clean surface, then you can use vaseline or glicerine (they are radically different),
question is that if you need to use a cover adhesive tape afterwards, it will not stick, unless you use the textile tape that luis proposed that is meant to stick to itself and not to the cable
in any case the use of vaseline will make the cable practically imposible to handle afterwards with a tape, as your hands will have vaseline and you wont be able to apply the tape
glicerine is radically different, it will refresh the plastic of the cable but it wont be so sticky afterwards
another thought about glycerine and vaseline:
vaseline is petrol based so it will damage your EPDM-rubber seals, i.e. all those of the braking system, so, never apply vaseline to the brake system seals, and in principle not to the weatherstrips and so on neither
vaseline comes in both liquid and a sort of creme format
glycerine, a sugar alcohol polyol, used as humectant, is the choice for those EPDM-rubbers, it comes usually in liquid form
vaseline is ok for all NBR-rubbers (basically all those fuel and oil resistant rubbers, seals, including suspensión bushings and so on)
you can buy expensive comercial products that may have other additives to the basic formulae, but in drugstores or pharmacies you will get the essential compounds that work just well
IMHO
