Okay. To me the big problem you have is a lot of competition. Simple as that. Actually, I just spent the past 10 minutes and I couldn’t even find you even though I put in a few filters, dates etc. So what to do?
First up. When I search for an AirBnB for my own use, I prefer to use a place with lots of glowing reviews and ideally a superhost. (Purely because it means they have a positive track record and when there is an oversupply of choices, why not go for the best). This doesn’t help you at all as you don’t have superhost status or glowing reviews - yet!!!
Secondly. I look at the first photo. To be honest, your main photo is not inspiring. It is dull! I want more than a shot of a lounge room. If I am going to Prague, I don’t particularly want a brand new apartment. I want atmosphere and to feel as if I am experiencing what the town is like rather than a modern apartment.
Third. The photo I feel should be your main photo is number 15: “Apartment from the outside”. Much more appealing than a shot of a dining table and lounge. Number 15 straight away tells me it is a nice old building in a popular area. Would even be better with a description saying exactly which it is in the street. Maybe a shot of you leaning out the window or something - then you could say “Hey this is my apartment and thats me leaning out the window”. Not exactly but I am sure you get my point.
And the rest of your photos - sorry, but unappealing. You are up against some tough competition. You need to offer something a bit different than normal accommodation. Show more of what is in the immediate area of where you are. Tourists will want to spend time looking around. Not spending all their time in your apartment. May be a shot of the local coffee shop or bar?
On a typical search page for a place in Prague, there are 18 photos to choose from. Out of the page I am looking at, 16 are pictures of beds, dining rooms, a set of chairs, two windows. Only two are of the outside showing how charming the building is. The rest could be ANYWHERE IN THE WORLD! BORING!!!
I went straight to the two that look like they are in the historic part of Prague.
Fourth. Try opening it up for single nights booking. I know it is not great but this will at least eliminate some of your competition. I have only had my place listed for 4-5 months and offer single nights. Don’t like doing it but I need lots of reviews. My price is half of what I want but reviews first to work my way up the AirBnB ladder.
Sorry I can’t be much more helpful but you have to consider the reality of supply and demand. Think differently and stand out from the rest. As others have stated, it is the end of the season thus the huge choice available to guests.
I am in our off season and have few bookings. Disheartening of course, but looking forward to the busier season when I can take advantage of my few but positive reviews.
P.S I love Prague!