I love my Weller WESD51 ...
https://www.amazon.com/gp/product/B000ARU9PO/ref=oh_aui_search_detailpage
I don't use the sponge, though. I use this Hakko brass wire cleaner ...
https://www.amazon.com/Hakko-599B-02-Wire-type-soldering-cleaner/dp/B00FZPGDLA/ref=pd_bxgy_img_2