If you do this, always choose a water-based lubricant. Oil-based or silicone-based lubricants can damage your dolls, and cause staining. KY Jelly in Astroglide are two examples of water-based lubricants.
Apply lubricant any place that you intend to penetrate. Just don’t go overboard. If you attempt to use too many things will get sticky and messy quickly. Here is a bit of a sex doll life Pro tip. If you think you need a bit more lubrication, try adding just a tiny amount of warm water instead. This can reactivate the lubricant And is often all you need to continue with your experience.
There are some people who prefer to take a dryer approach. For this purpose, they often use powder. This reduces friction but creates a very different sexual