Context:
My sibling (mid-20s) takes a shower and brushes their teeth late at night, normally between midnight and 1:30 AM). This usually wakes me up, because we are living in a "Jack and Jill" set up (shared bathroom between our bedrooms).
I would like to think the best way to approach this would be to simply explain my problem of sleep being interrupted and offer solutions, but it's ignored.
I suppose they believe I don't need so much sleep (I find I need 8-10 hours), and that I should act like my sibling and stay up late.
Some Related-ish Details:
They are plenty of "issues" with my sibling, enough that I could make a whole new post! But in summary, using the term from Steven Covey's 7 Habits of Effective People, my sibling lives a very "pleasure-centered" life; they "hate waking up," and this may be part of why they sleep late: not wanting to wake up to have to deal with another day. (They tend to wake up in the early afternoon.)
I haven't really dealt with their "issues", as I'm not the parent. But I do have some resentment due to my sibling's dislike of me and their refusal to share in childhood, and I've also been very busy with my own share of work (school and work terms). I don't find I have as much time or interest to drown in video games and shows, which is what my sibling is interested in.
My sibling doesn't seem to care about anything besides enjoying their debaucherous lifestyle of doing whatever they want whenever they want. They have a part-time job, play a lot of video games, watch movies/TV, and are constantly browsing the net. They don't really contribute to the household chores either, and don't care about anything our parents try to get them to do. My parents seem more and more resigned to this as time passes.
I haven't been living in this house for very long as I've been very busy doing school and work terms elsewhere.
Possible solutions/approaches and my thoughts on why they may fail.
I thought it would be best to propose a few solutions to my sibling rather than nag them about the problem.
Ask my sibling to shower and brush and their teeth in our grandparent's bathroom instead, which is downstairs, so it won't wake me up.
Caveats: They probably don't even want to walk down there despite the short distance...plus it smells like old people. They'll also probably flip the tables and ask me why I can't sleep in our grandparent's room. Also, this maybe isn't really fair to my grandparent, since they'd possibly be woken up. (Though they're quite old- late 90s in age, dementia, etc.- and hard of hearing.)
Ask my sibling to shower and brush their teeth earlier, even going as far as to ask them to do it every day ~10PM.
Caveats: Done this before they don't really care, and even when I nag them to do it earlier. Plus, they might be "too busy" in the middle of an online game they can't pause, or want to finish an entire movie/TV episode. Like many humans, they don't like being told what to do or asked to do something.
In fact, months ago I did say something along the lines of "hey can you shower earlier so it happens before I try to sleep?" And the reaction was annoyance and disbelief, and though they said that they'd do it, nothing ended up happening.
Get parents to ask my sibling to shower and brush their teeth earlier.
Caveats: They'll just ignore it as usual, or pay lip service temporarily- My interpretation is their habit and endless debauchery is more important than my sleep. This solution doesn't do anything to make my sibling do the right thing consistently.
I go sleep in the basement where I'll be stuck dealing with the noise of the water tank and heater instead.
This could attempt to avoid the problem but it doesn't really solve the problem of a lack of respect, and I don't like the idea of letting my sibling just walk over everyone else in the house and setting another precedent of they can do whatever they want and everyone else has to work around them. And the problem doesn't necessarily get solved either, as now I have the water tank and heater to deal with instead.
I suppose I can try them all. I have previously slept with earplugs however I don't enjoy it and don't want to be wasting money on it. Ultimately I feel rather pessimistic as I don't understand how you can really negotiate with a party that doesn't really care or consider your needs reasonable.
Later I hope to move out once I get full-time work elsewhere, but that'll be in the future. I would appreciate any advice I can get, perhaps I am approaching the problem wrong and I must solve other related problems.
I previously read Crucial Conversations a long time ago but I still feel like I'm at a loss for how to approach this.
So, how can I best approach my sibling and ask them to shower and brush their teeth at an earlier time so they don't wake me up.
Edit: Upon proposing solution 1 and 2 to my sibling I was brushed off with as many "yep" and "yeahs" quickly to get rid of me, as I was interrupting them in a turn-based card game, which doesn't demand immediate undying attention in my opinion.