I use a firm bristle toothbrush.
The frequency is weird though. Depending on flow and microenvironment elsewhere, the frequency I need to clean them is wildly variable. I haven't intentionally cleaned them in maybe 6 months as they don't really seem to clog much these days. In the past I had to do it as frequently as ever 2 weeks.
Anecdotally shading them to cover my overflows has been a huge boon. They seem to need cleaned much less often now.
The frequency is weird though. Depending on flow and microenvironment elsewhere, the frequency I need to clean them is wildly variable. I haven't intentionally cleaned them in maybe 6 months as they don't really seem to clog much these days. In the past I had to do it as frequently as ever 2 weeks.
Anecdotally shading them to cover my overflows has been a huge boon. They seem to need cleaned much less often now.


