Also, brushes for lab work are great too. They are malleable so you can just flex it into the shape you want to clean the inside of stuff.

https://www.amazon.com/Lab-Cleaning-Brushes/b?ie=UTF8&node=317972011

Specifically tube brushes

https://www.amazon.com/FOCCTS-Cleaning-Brushes-Glasses-Keyboards/dp/B07G426WTV?ref_=Oct_RAsinC_Ajax_317972011_5&pf_rd_r=2K7C1QWWFXKQCMN1ABQD&pf_rd_p=89c9fcd9-7662-55b8-b78f-f55b2ffaf523&pf_rd_s=merchandised-search-6&pf_rd_t=101&pf_rd_i=317972011&pf_rd_m=ATVPDKIKX0DER