Hanging leafs getting worst

1 litre is nowhere near enough water. Try and give her 3-4 litres of plain water with no extras and remoisten the entire volume of substrate thoroughly and this should save your plant. You need to water enough each time so that some water comes out of the bottom of the pot. This is the only way to know if the soil is moistened from top to bottom and will also help prevent any mineral salts left over from the nutrients from building up. Give your plant the 3-4 litres of plain water over a couple of hours in about a litre at a time and if your plant doesn't recover, I would be extremely surprised. Do this immediately and not leave it too long before you do, if you want to rescue this plant from certain death. After this try and maintain an even moisture and water the entire surface of the pot. I can see in your pictures that there seems to be a wet patch around the stem only. Your plants roots will be all throughout the pot and watering just near the stem just doesn't work. When she has recovered after this, water your plant when the top inch or so is dry and water deeply and evenly. Your plant will probably need water every 3-5 days depending on temps etc and water until run off, which could easily be as much as 2-3 litres each time. At this stage your plant is severely dehydrated and giving her a deep and thorough soaking with plain water will hopefully rescue her, before it is too late. I would love to follow up on your question and if you would be so kind as to posting me a chat message on my page, I would really appreciate to hear if you managed to successfully rescue your plant. Thanks in advance. Hope this helps,..... Organoman.