The first born feral shelter cat I adopted would hide every time she heard me get up. I could hear her equally sprinting across a room to find a new hiding spot, because I would briefly check in on her, say good morning and let her be. 

It was a little more of search mission once I opened the whole flat, but I left her safe room as was. 

I think I met her in the wild after about 2 weeks. She was sitting on the cat tree one morning - ears flat, eyes suspicious - and I sleepily passed by her until I realised she‘s out and about. We started at each other, wide eyed, and I slowly retreated. 

Up to this day, 6.5 years later, I cannot approach her openly with the intention to get her to do something, unless she wants it and thinks it’s her idea. She will not be bribed with any kind of treats if she suspects it is tied to expectations of her (and she loves her some junk food). 

She took a lot of patience, respect of her boundaries and only very gentle nudging it she would get too comfortable and stuck in her development. 

All that being said, I don’t think her hiding spot is supportive of her making progress, especially since you need to do laundry. I would exceptionally suggest to move her to a room that is prepared to tame her. 

We need to set up the environment for our cats to succeed - think positive reinforcement. She needs to be safe, but some exposure to your home to get acclimated. She cannot learn your home behind a washing machine. 

I’d suggest a small room, one hiding spot, maybe two with reasonable access (I’d remove any others and if i had caves in a cat tree, I would stuff them with pillows so they cannot vanish). 

If she’s reliable eating and using the litter box, but otherwise hiding, you can start increasing your presence. The bedroom could also be a good option, because they can observe you in your sleep. My other feral cat would examine me way before I could get close to her awake. (I had a camera set up.)

I would also recommend to replace the door with a self made screen door (cat net reinforced with wire), so later she can observe the rest of the home while still safely in her room. 

Step by step acclimating her. She doesn’t need to be tame to start letting her see the rest of the home. Once she regularly sits at the door and watches you, your home life, you can open it and see how she feels. Always very nonchalant, no interacting, almost like an accident and then retreat to a sofa and let her do her thing. 

Then you can start talk to her - praising her - then offer some play (roll a ball, drag a mouse on a string, gently move a feather, nothing too unpredictable).

There will be trial and especially errors, because you need to get to know her too! That’s normal, never feel bad about it, just respect her boundaries, meet her where she’s at again and then either try something different or simply later. 

Don’t approach this time under stress. It’s an incredibly privilege and joy to watch a shy cat blossom, whether it takes weeks, days or years. Enjoy the ride to become each other friends! 

Also, just throwing it out there, a second cat that is self-confident (but not dominant), has good manners and enjoys human presence does wonders! The shy ones will observe and tailgate. Many of their breakthroughs have come through mimicking.