[Sid Squid]

Are they textile gloves? If so then read the second paragraph.

If not then:

As you may know Goretex is a breathable membrane liner inside the glove outer skin, it has gazillions of teeny weeny holes in it which are smaller than a water droplet, so rain water doesn't get in, but bigger than a water molecule so sweat can get out. If you just wanted waterproof you could put a rubber glove over them and they'd not let water in - but you'd have sweaty hands. Anything that is a waterproofer for leather etc is the waxy equivalent of rubber gloves - it works by being a waterproofer, it doesn't and indeed cannot mimic the function of the membrane, which is probably torn.

In the case of a textile jacket or trousers, often the membrane is compromised by being dirty - this wicks water across the membrane, washing with a suitable cleaner often improves the waterproofing, also the outer being clean and sheer again means a lot of water just runs off before getting anywhere near the membrane. If there's leather on the garment it'll probably not respond well to cleaning. Of course, just like above, if the membrane is damaged cleaning it won't make it heal up.