When a parent starts leaving the door unlocked

If your mum or dad has started leaving the front door unlocked, you are probably doing the nightly phone call. “Did you lock up?” “Yes, love.” And then you lie there wondering whether that was a memory or a reflex. It is one of the first small things to slip, long before anyone would call it a problem, because locking a door is a habit, and habits are what memory loses first.

What is actually going on

Locking up is one of the most automatic things a person does. It happens dozens of times a week without any thought, which is exactly why it is vulnerable. When memory starts to change, whether through ordinary ageing, tiredness, a new medication or the early stages of dementia, routine tasks done on autopilot are often the first to slip. The bigger, deliberate tasks can stay intact for a long time.

It is not wilful and it is not carelessness. Your parent may genuinely believe they locked the door, because for most of their life they always did. That is why asking them, however gently, rarely settles the question for either of you.

If you are seeing other changes as well, such as missed appointments, repeated questions or difficulty with familiar tasks, it is worth talking to their GP. A forgotten lock on its own is common; a pattern is worth a conversation.

First, talk about it with them

Most parents do not want to be checked up on, and nobody likes being told they are forgetting things. A few approaches that families find easier:

• Talk about the door, not about their memory. “I worry about the door at night” lands better than “you keep forgetting”.
• Make it about your peace of mind. Many parents will accept something that helps you sleep before they would accept something “for them”.
• Keep their routine. The best solutions change nothing about how they lock up.
• Avoid anything that feels like surveillance. Cameras inside the home are a big step, and most people rightly resist them.

The lock itself

Start by looking at the lock they have. A thumb turn on the inside is usually easier for older hands than a key, and it means they cannot lock themselves in with the key in another room. If the door has a euro cylinder that needs a key on both sides, a locksmith can usually swap it for a thumb turn cylinder for under £100. If you change the cylinder, keep it insurance-rated (look for anti-snap and a recognised security standard) so the home insurance is not affected.

A key safe for carers and family

A police-approved key safe outside the door means family, carers and, in an emergency, paramedics can get in without breaking the door down. Think carefully about who holds the code and change it if that list changes. A key safe solves getting in; it does not tell you whether the door was locked again afterwards.

Telecare: door sensors, pendant alarms and what they are for

Telecare covers a range of devices, often arranged through the local council or a telecare provider. A pendant alarm lets your parent call for help after a fall. A door exit sensor alerts a monitoring centre or a family member if the door is opened at night, which is the right tool if wandering is the worry. These services are designed for safeguarding and often include a response service. Your local adult social care team can carry out a needs assessment and explain what is available.

Knowing it is locked without phoning every night

There is a way to know without asking. Locksure fits beside the lock they already have, so nothing about locking up changes for them: same key or thumb turn, same action they have done for fifty years. The monitor reports whether the lock is locked or unlocked to a small display at their house and to the Locksure app on your phone. When you check at ten o’clock, you see cyan for locked or amber for unlocked, and if it is amber you can ring with a real reason rather than a worry. It costs £89.99 with the hub included, there is no subscription, and one person can set it up on a visit in about ten minutes. It cannot lock the door for them and it cannot stop them opening it; if wandering is the concern, a telecare door sensor is the right tool and we say so below.

A door can be shared with other family members in the app, so brothers and sisters can see the same answer without all ringing at once.

What a lock monitor will not do

• It cannot stop anyone opening the door or going out.
• It cannot lock the door. There is no motor; someone still has to turn the key or thumb turn.
• It is not a safeguarding or telecare device and has no response service behind it.
• It does not record who was at the door. It only reports the state of the lock and when it last changed.

Used for what it is, a quiet way to know the front door is locked, it can remove the nightly phone call. If the situation needs more than that, the organisations below can help.

Where to get advice

• Alzheimer’s Society: information and a support line for anyone affected by dementia, including family members.
• Age UK: practical advice on staying safe and independent at home, and an advice line.
• Your local council’s adult social care team: a free needs assessment, which can lead to telecare and other support.
• Their GP: if you are noticing memory changes beyond the door, the GP is the place to start.

Questions

Will they have to learn anything?

No. They lock the door as they always have. The hub plugs into a socket in the hall; you set it up on a visit.

Can I check from my own home?

Yes. The app shows the last reported state from anywhere with a connection, and a door can be shared with other family members.

Does it stop them opening the door or going out?

No. It only reports whether the lock is locked. For wandering, ask about telecare door sensors through adult social care or your GP.

What if their internet goes down?

The hub at their house still shows locked or unlocked. Your app shows the last state it received until the connection returns.

Is it a camera?

No. There is no camera and no microphone. It senses the position of the lock and nothing else.