An easy way to know whether or not a material is compatible with a certain type of lubricant is to check out the material safety page. Let's look at the much-loved Uma as an example. If you scroll down the page a little bit, on the left, under "Material/Texture ", you will see that it says it's made of silicone. If you click on the word "Silicone" (or whatever else it's made of), you will be taken to the material safety page for silicone. On the bottom of the entry for silicone, look under "Lubricants" . Whatever lubricants are there (Water, Silicone, or Oil) are the lubricants that are compatible with this material. In this case, you can only use water-based lubricant with silicone and therefore, you can only use water-based lubricant with the Uma. If you remember to do this every time (and eventually you'll memorize them for yourself), you'll never have another mishap like that again!

(And in case you didn't know, if a word is pink and underlined, it is a link and you can click it, such as above in my post and in the examples I pointed out.)

Hmm. I'm not sure. But I'd use water-based lubricant, just in case. The product could be mislabeled on the site. It could be made of TPR Silcone, instead. I'm not sure. But it's best to listen to the packaging.