Lack alternative is either the "steady warranty replacement", or use an inrush current limiter such as Unitec 41748 or ELV 230V current limiter ESB 54. I try out now and am pretty sure that will work. Experiences I like to wear after!
What I do not understand: The problem is obviously known to the manufacturer. Why does not he improved to (NTC and / or higher quality relay)? But that's in the device price probably no longer there. Pity!
Supplement in July 2015:
Held the first device just 2 months (from January 2014 to March 2014), thus keeping the second currently more than 1 year (March 2014 to date), at exactly the same use - but with the ELV current limiter (as a kit for 24.95 )! - In the unlikely still a defect, so I will report.