Biblatex space between [ and number

I use the following lines of codes to use biblatex. It all works, but the following: At every citation the citation looks like: [ 1] instead of [1]. This is true for all citations in the document. And I'm out of ideas how to solve this. Any help is appreciated. Thanks a lot in advance.

``````\usepackage[backend=bibtex,style=numeric-comp,sorting=none,doi=false,isbn=false,dateabbrev=false]{biblatex}
\AtEveryBibitem{%
\clearlist{language}
\ifentrytype{misc}{}
{
\clearfield{url}%
\clearfield{urlday}%
\clearfield{urlmonth}%
\clearfield{urlyear}%
}
}
\AtEveryCitekey{
\clearfield{url}%
\clearfield{urlday}%
\clearfield{urlmonth}%
\clearfield{urlyear}%
}

\renewbibmacro*{volume+number+eid}{%
\printfield{volume}%
\printfield{number}%
\printfield{eid}}
\DeclareFieldFormat[article]{number}{\mkbibparens{#1}}

\renewbibmacro{in:}{%
\ifentrytype{article}{}{\printtext{\bibstring{in}\intitlepunct}}}
``````
• Welcome to TeX.SX! `%` at the end of `\AtEveryBibem` lines is not so important, because the items are evaluated when TeX is still not typesetting the entry; conversely, they will produce a space when the code in `\AtEveryCitekey` is performed. Oct 12 '14 at 18:11

``````\AtEveryCitekey{%  <--- You need the %