When you say that you give her clonazepam - this is prescribed for her, is it? Assuming that it is, and I certainly hope so, I should go back to the doctor who prescribed it, report that it isn't working, and ask for a rethink.
Do you know what is keeping your mother awake?
Is it pain, anxiety, anything like that? Is this a new problem for her, or one she's struggled with for a long time?
I'd ask her doctor to try something else, if that's not working. Sometimes, it takes a little time to adjust medication. That really helped my LO.
I'll also add that I had a little problem with insomnia recently, (I think this covid thing has me anxious) and I started playing rain sound from a nature app on my ipad. I am pleasantly surprised how much it has helped me. I have rested so much better. It's unbelievable. And, the app was free! I know that with people who have dementia, they sometimes may not react to sound the way they normally would, so, I'd keep that in mind, but, you can ask her doctor about it. While to me, it sounds relaxing, to someone with dementia it might cause them to be curious about the sound, annoyed by the sound, etc. But, that's an individual thing, I suppose.
If your mother suffers from dementia, I've found nothing much to help with the sleep issues that come about as a result. My mother is 93 and hasn't slept well for YEARS. Took Ambien for quite some time, till she fell asleep on the toilet and broke her foot after stumbling into the bathtub when trying to get back to bed. Nowadays, she lives in a Memory Care ALF and complains constantly that she doesn't sleep. They give her (on doctors orders) Melatonin and a pain killer for her neuropathy before bedtime, but she still has 3 or 4 bad nights a week). Medications tend to wear off (except for hypnotics such as Ambien) it seems to me. Will your mother's doctor up her dose of Lorazepam, perhaps? Most doctors don't like to give these types of drugs out to elders b/c of fall issues, etc. But it can't hurt to ask.
You can also try preventing her from sleeping too much during the day and developing a sleep routine for the evenings. Check out this link for lots on that topic:
Do you know what is keeping your mother awake?
Is it pain, anxiety, anything like that? Is this a new problem for her, or one she's struggled with for a long time?
How active is she able to be during the day?
I'll also add that I had a little problem with insomnia recently, (I think this covid thing has me anxious) and I started playing rain sound from a nature app on my ipad. I am pleasantly surprised how much it has helped me. I have rested so much better. It's unbelievable. And, the app was free! I know that with people who have dementia, they sometimes may not react to sound the way they normally would, so, I'd keep that in mind, but, you can ask her doctor about it. While to me, it sounds relaxing, to someone with dementia it might cause them to be curious about the sound, annoyed by the sound, etc. But, that's an individual thing, I suppose.
You can also try preventing her from sleeping too much during the day and developing a sleep routine for the evenings. Check out this link for lots on that topic:
https://www.google.com/search?q=sleep+routines+for+elderly&rlz=1C1CHBD_enUS896US896&oq=sleep+routines+for+elder&aqs=chrome.1.69i57j33l4.9302j0j9&sourceid=chrome&ie=UTF-8
Best of luck!