Ah yes, you are right! I was going by ear, rather than by the written version, in fact I can't recall seeing it written. German is a language that I will happily use but don't ask me to write a letter in it, you'll probably need exponential notation to represent the number of errors.
As a matter of fact schweissen is only correct spelling in Switzerland.
In Germany it would be schweißen.
Ah yes, you are right! I was going by ear, rather than by the written version, in fact I can't recall seeing it written. German is a language that I will happily use but don't ask me to write a letter in it, you'll probably need exponential notation to represent the number of errors.