[MrFixr55]

I like to tape off labels, take into the bathtub and hose it down with dish soap (and 10% bleach in water if it was a mouse house) and the Shower Massage. Does a great job, and everything gets hosed and cleaned i the cabinet that way

BTW, why the noise in AC-DC sets but not transformer powered? It is because:
The power transformer is a natural low-pass filter.
The Full Wave Rectifier cancels "common mode", in a manner similar to a Push Pull Output stage.

I have tried to run an AC-DC set off 2 portable power packs that have "modified sine wave" output. Lots of noise. Same power supplies on transformer sets with full wave rectifier, no noise. I have used these supplies for outdoor "live sound" PA gigs for the mixer and wireless mic receivers. However, for better portability and easier setup (the mixer and mic receivers are in a "road case", like a portable rack mount), I use batteries and no convertor. The Mic receivers run on 120VAC to 12VDC "wall warts" so I installed "shoes" in the case for 12V Lithium power tool batteries. For the 120V to 34V (with center tap) AC transformer, I replaced that with 2 shoes for 24V Lithium power tool batteries. Nice and clean.