For the record, this question is only in regard to models that are designed with a bucket (which happened to be a few on this list). With this type of model, you may experience leaking from time to time. Do not fret as wood can’t completely seal so there is always a chance for leakage. If you notice that this is an issue, though, here is what you need to do.
Clearly, to begin, empty the bucket and ensure that no ice cream is still inside. Then, fill it up with water so that around 2/3 of the bucket is filled. Then, leave the bucket in your sink and allow it to rest for around one to two hours. Essentially, this water is going to expand the wood to prevent leakage during the freezing process.