# Bottle warmer care with hard water and mineral buildup Which bottle warmers hold up best when used with hard water that causes mineral buildup? None of the checked facts covers hard water or mineral buildup\. The closest care facts are: Dr\. Brown's AC262: Cleaning: hand wash reservoir and lid before each use; reservoir is glass, handle with care; wipe base with damp cloth or sponge\. Dr\. Brown's AC147: Do not immerse in water; household use only; do not use outdoors\. ### 1. [Dr\. Brown's AC262](/products/ucp/drbrownsbaby-com/9139835011349) (sold by drbrownsbaby\.com) Cleaning: hand wash reservoir and lid before each use; reservoir is glass, handle with care; wipe base with damp cloth or sponge\. - Cleaning: Cleaning: hand wash reservoir and lid before each use; reservoir is glass, handle with care; wipe base with damp cloth or sponge\. (manual) - Water and immersion: - - Materials: The warming tank is made of glass, which helps maintain temperature without transferring plastic smell or flavor\. (guide) ### 2. [Dr\. Brown's AC147](/products/ucp/drbrownsbaby-com/9139827343637) (sold by drbrownsbaby\.com) Do not immerse in water; household use only; do not use outdoors\. - Cleaning: - - Water and immersion: Do not immerse in water; household use only; do not use outdoors\. (manual) - Materials: - Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-12T01:26:02.855Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)