Formatting acronyms using glossaries package

[Hooman]

Hello,
I have been trying to change the way my acronyms show up in the main
body of the manuscript. I have defined

\usepackage[acronym, style=long, sanitize={description=false}, smaller]
{glossaries}
\renewcommand{\glsnamefont}[1]{\large \textsc{\MakeTextLowercase{#1}}}
\renewcommand*{\acronymfont}[1]{\large \textsc{\MakeTextLowercase
{#1}}}
\makeglossaries

The problem is that if I use the acronym ABC in its plural form, the
added 's' also shows up in larger size small-caps, which is not
correct. Assuming that capital letters stand for small caps, using \gls
{abc} results in ABC, and using \glspl{abc} results in ABCS, whereas
the correct form should be ABCs.

Could somebody please tell me how this can be done? I would appreciate
it greatly.

Regards,
Hooman