I use the condom/spin:
First I stick a needle in the cotton a few times around the outside edges to get it free and fluffy like new again (if used after cleaning and dry, not new).
Second, with both condoms off, I fill the top condom about 1/3 the way full with my flav of the day, then slowly push the mouth side in on a counter top, not in hands in case it comes out some how. (fill mouth side, leave the rubber/plastic mouth piece in, helps make the liquid go straight to the cotton) While doing this watch the batt end and do slowly and make sure no liquid comes out from the small batt hole.
Third, take a sock (pref. a clean one) and put the carto with just the cap I pushed on and still no cap on the other side (no cap on batt. side) and face it mouth side pointing up, then spin it a good 10 whirls.
Fourth, take carto out of sock take off condom, take off mouth rubber/plastic insert and check, if still not filled I will repeat steps 2-3 again (most likely and 80% of the time you will need to repeat to fill fully)
Finally, after cart is full and ready to enjoy, stick a straightened paper clip in the batt end SLOWLY, twisting to move it through if needed, till it appears through the hole in the top of the cotton.
(((Last step is not needed and may not be safe to do unless you feel like you can, this step to me ensures the hole is free and clear and makes the air way more open on used carts, also I have found it clears out any and all liquid that might have gotten in that air hole and thus preventing nasty mouth liquid shots!))) [[use to use a needle, but now a paper clip thanks to PawPaw!]]
And

enjoy