Putting product into use within withdrawal period

During the withdrawal period, you may open the packaging. And you may try the product, just like in a normal store. But you may not do more than is necessary to evaluate the product. Did you actually use the product? And did the product become worth less as a result? Then this may affect the amount you receive back after returning it.

Can I tear the packaging?

You should leave the packaging intact as much as possible. And when you return the product, you should pack it up again neatly. Is the packaging torn, but was it easy to open without breaking it? Then this may affect the amount you receive back after the return.