How do you condition a new glove?
To begin place the ball inside the mitt where the pocket meets the palm. This is where the ball is
While breaking in a glove is extremely important, it's not all. New glove usually has hard leather, so we need to add oil to soften it. As for the used glove, this is a way to keep the skin from drying out.
I just simply slap it on the leather. And use my hands to spread it you can wash your hands
Try to concentrate on the “pocket” of the mitt. Usually the pocket is formed on the palm between the thumb and index finger of the glove slightly below the webbing. Most gloves vary in terms of break in times, but if you follow these techniques your glove should be game ready in about 1-2 weeks.
How to Break in a First Base Mitt [the right way] - YouTube
Steaming your glove is easy, quick and effective. However, the process can negatively affect the leather's fibers. (That's why steaming voids Wilson's one-year glove warranty.) Steaming your glove will soften it, but will also make it less durable.
Some break them in by dunking them in water or placing them in a microwave oven. Some, like Rodriguez, lather them with shaving cream. Others beat them with a mallet, as if tenderizing a steak.
CONDITIONING THE GLOVE THROUGHOUT THE SEASON
Don't forget to also care for your glove's leather by applying a small amount of oil or glove conditioning cream every so often during the season. It's also a good habit to treat your glove just before you store it away for the offseason.
The need for oiling can range from 1 time per week to 1 time per month, depending on the humidity where you live. I use Lexol spray, saddle soap or mink oil when conditioning my glove.
After your glove is broken in, you should continue to apply glove oils and conditioners throughout the season. Make sure not to overdo it though. Applying oil three to four times throughout the season should be sufficient.
What can I use to condition a baseball glove?
Most people use shaving cream (preferably with lanolin), but you may also use others like Vaseline, mink oil, tanner's glove oil, glove manufacturers oils, saddle soap, etc. Lubricate the glove with your lube preference, say shaving cream. Take a very small amount, and put it on a soft, clean cloth like a dish towel.
Oil your baseball glove regularly
Also, don't forget to oil your glove periodically, especially in drier areas of the country. The need for oiling can range from 1 time per week to 1 time per month, depending on the humidity where you live.

Glove conditioners are different from regular oils because they contain additional ingredients that not only soften the leather but clean it and protect it from absorbing moisture and dirt.
How to condition and maintain a baseball glove - YouTube