This is a very easy and cheap way to get rid of smelly rugs – it´s a quick DIY solution.
You´ll just need a spray bottle, hot water and some pieces of grated lemon zest.
Put the hot water in the spray bottle (carefully) and add some pieces of the grated lemon zest. Shake the bottle. Spray some water over the rug. It´s a perfect deodoriser for smelly rugs, isn´t it? But you have to repeat this procedure every time it starts to smell.