1) Bleach (I use Clorox)
3) Clean water
4) Spring washer (I use ADA Spring Washer)
1) Prepare 3 parts of bleach to 1 part of clean water (3:1) in a bucket.
2) Soak glassware (lilypipe) in the bleach solution for about 1 to 2 hours. Soak longer if need to.
3) Remove the glassware and rinse with clean water.
4) Use spring washer to clean stubborn stain/slime/algae if required.