Ultrasonic cleaners are the bomb, I got this one;
https://www.ebay.com.au/itm/2L-Digi...=item4d8090d31e:g:eQkAAOSw0kRbrFBv:rk:65:pf:0
But should have got this one to fit bigger bongs in;
https://www.ebay.com.au/itm/Digital...var=651280422606&_trksid=p2060353.m1438.l2649
https://www.ebay.com.au/itm/2L-Digi...=item4d8090d31e:g:eQkAAOSw0kRbrFBv:rk:65:pf:0
But should have got this one to fit bigger bongs in;
https://www.ebay.com.au/itm/Digital...var=651280422606&_trksid=p2060353.m1438.l2649