With my clients, I tend to offer them sample sizes of products to try at home to see how they get on with them.
For instance, I might really love a product but a client might dislike the smell or the texture (oil v cream) so it just depends.
For a deep conditioning treatment I'll add some Olaplex to a moisturising mask and put a plastic wrap over it to keep in the heat. (You could probably use clingfilm at home). Perhaps you could do something similar one evening and leave it on for about an hour?