This is the brush i recently bought and use if the wooden brush is not able to get the hard stuff out and has replaceable brush head

Char-Broil 8666894 SAFER Replaceable Head Nylon Bristle Grill Brush with Cool Clean Technology, One Size https://smile.amazon.com/dp/B00IJ3C28I/ref=cm_sw_r_apan_glt_i_7BCJTE9TFEQB89WHR20D?_encoding=UTF8&psc=1