There is no reason to put ourselves into a lion's den. Having a filter so we don't have the chance to fall is a major breakthrough. It is also important to ask ourselves what we would do if we were alone in a room with an unfiltered device because it will probably happen at some point. We should be able to build the determination not to use the device at all and to leave the house if necessary. This can be accomplished through regularly reading The Battle of the Generation.
We can work on this by refusing to look at a YouTube video someone tries showing us because we don't watch YouTube. We can refuse to use unfiltered devices when we are in someone else's house because we don't use unfiltered devices. This will train us to stay away from an unfiltered device when we happen to be alone with one.
Your end goal should be to be able to refrain from using unfiltered devices, and to be able to firmly say "I don't do that", however, you shouldn't be overly concerned if you aren't holding there yet, to the extent that you feel like you haven't accomplished anything, because the truth is that there is a lot that you accomplished and you are a work in progress. The Yetzer Hora knows that he has a harder time getting us to sin if we feel good about ourselves, so he sometimes tries to minimize our success and lower our self-esteem by telling us that there is so much more that we still haven't achieved. The way to fight this is by looking back to the place where we were holding when we first began our journey and celebrating how far we have come, while at the same time being humble and acknowledging our shortcomings and that we have more work left to do.
I suggest that you read Chapters 36-41 of The Battle of the Generation which are on the Daily Dose schedule for this month and address your concern in great detail.