I bought a SoClean to keep my CPAP machine clean, I found the instructions a bit daunting as it is very multi-lingual, I actually cut up the instruction sheets to reduce the number of language variables, and once I realised I didn't have to use ALL the parts in the adaptor that customises the SoClean to work with a wide variety of CPAP machines, mine was adaptor 5, I was then a little disappointed to discover that I had been charged £19.99 for what is essentially a 10cm rubber hose with a small bit of plastic on one end, as I could discard the more complex part in the kit. However,after the 5 days I have had the machine, it seems to be doing what it says on the label.