Silicone cartridge clogged?
Who does not know that? Rarely needed silicone cartridges are glued if necessary.
Basically, I always put enough screwed nozzles and do not use the enclosed nozzles.
To protect the nozzles against dehydration, I put some cling film in the screw caps. If, nevertheless, the nozzle of the cartridge is dried up, I exchange the nozzle, if also the opening of the cartridge is dried up, then you can wonderfully with a corkscrew the dried out silicone rausbohren.
To remove the lumps, simply unscrew the enclosed non-closable nozzle and press firmly. The lumps migrate into the nozzle and after changing the cartridge works properly again.