lube one side of each patch, and stack the patches. Don't lube the last patch. now, put them in a micro wave and give them several 5 second bursts of micro waves. Open the door and check them, after each burst, so they don't burn, and you can both see and feel the lube penetrating all the fabric.
Or you can put the patches on a plate, or cookie sheet over a warm stove, or in the hot sun and let the lube penetrate the patching that way. I have lubed patches all these ways, and more- but the micro wave is the fastest for consistency in lube on the patches. If you insist, you can put the patches on wax paper and use a butter knife to spread the lube on one side of each patch. I amnot that neat, and just use my finger to rub the patch material into my lube bottle, and then slap another patch on top of that lubed patch, and repeat the process. If I were lubing a strip of fabric, I might use the wax paper and butter knife , or spatula, or putty knife, approach. Then roll the strip up tightly, tie it, or rubber band it, and stick it in the microwave! I have also just rolled up the fabric, put it in a sealed contained and let time and ordinary body heat, or house heat spread the lube through the fabric.
As long as you wash the fabric being used for patches, or wash the Pre-cut patches, they should take lube evenly and easily. Its when you put lube on patches that are not washed, and still have sizing in them that the migration of the lube through the fabric can be " iffy".