If you've no syringe then remember syphoning works well. Better than pouring 5l jugs anyway.
When I used 1 litre bottles I'd just dunk the closed messy bottle into the res shake it around a bit et voila! bottle is clean. Wont work if you use a watering can of course but running under tap/fawcet will do the same thing.
When I used 1 litre bottles I'd just dunk the closed messy bottle into the res shake it around a bit et voila! bottle is clean. Wont work if you use a watering can of course but running under tap/fawcet will do the same thing.