diff --git a/ftl/core/deck-config.ftl b/ftl/core/deck-config.ftl
index 4930dbe0e..433a73eb2 100644
--- a/ftl/core/deck-config.ftl
+++ b/ftl/core/deck-config.ftl
@@ -383,6 +383,10 @@ deck-config-which-deck = Which deck would you like to display options for?
 
 deck-config-updating-cards = Updating cards: { $current_cards_count }/{ $total_cards_count }...
 deck-config-invalid-parameters = The provided FSRS parameters are invalid. Leave them blank to use the default values.
+deck-config-placeholder-parameters = 
+    Default parameters
+    (Press "{deck-config-optimize-button}" periodically to allow FSRS to better adjust to your memory)
+deck-config-manual-parameter-edit-warning = The parameters should only be modified using the optimize button. Manually editing them is heavily advised against.
 deck-config-not-enough-history = Insufficient review history to perform this operation.
 deck-config-must-have-400-reviews =
     { $count ->
diff --git a/ts/routes/deck-options/FsrsOptions.svelte b/ts/routes/deck-options/FsrsOptions.svelte
index 48124771f..080917491 100644
--- a/ts/routes/deck-options/FsrsOptions.svelte
+++ b/ts/routes/deck-options/FsrsOptions.svelte
@@ -387,11 +387,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 <Warning warning={desiredRetentionWarning} className={retentionWarningClass} />
 
 <div class="ms-1 me-1">
-    <ParamsInputRow
-        bind:value={$config.fsrsParams6}
-        defaultValue={[]}
-        defaults={defaults.fsrsParams6}
-    >
+    <ParamsInputRow bind:value={$config.fsrsParams6} defaultValue={[]}>
         <SettingTitle on:click={() => openHelpModal("modelParams")}>
             {tr.deckConfigWeights()}
         </SettingTitle>
diff --git a/ts/routes/deck-options/ParamsInput.svelte b/ts/routes/deck-options/ParamsInput.svelte
index d046c5e84..d2f5c49ac 100644
--- a/ts/routes/deck-options/ParamsInput.svelte
+++ b/ts/routes/deck-options/ParamsInput.svelte
@@ -5,9 +5,9 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 <script lang="ts">
     import { tick } from "svelte";
     import * as tr from "@generated/ftl";
+    import Warning from "./Warning.svelte";
 
     export let value: number[];
-    export let defaults: number[];
 
     let stringValue: string;
     let taRef: HTMLTextAreaElement;
@@ -46,21 +46,57 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
             input.value = stringValue;
         }
     }
+
+    const UNLOCK_EDIT_COUNT = 3;
+    const UNLOCK_CLICK_TIMEOUT_MS = 500;
+    let clickCount = 0;
+
+    let clickTimeout: ReturnType<typeof setTimeout>;
+
+    function onClick() {
+        clickCount += 1;
+        clearTimeout(clickTimeout);
+        if (clickCount < UNLOCK_EDIT_COUNT) {
+            clickTimeout = setTimeout(() => {
+                clickCount = 0;
+            }, UNLOCK_CLICK_TIMEOUT_MS);
+        } else {
+            taRef.focus();
+        }
+    }
+
+    $: unlocked = clickCount >= UNLOCK_EDIT_COUNT;
+    $: unlockEditWarning = unlocked ? tr.deckConfigManualParameterEditWarning() : "";
 </script>
 
 <svelte:window onresize={updateHeight} />
 
-<textarea
-    bind:this={taRef}
-    value={stringValue}
-    on:blur={update}
-    class="w-100"
-    placeholder={render(defaults)}
-></textarea>
+<div
+    on:click={onClick}
+    on:keypress={onClick}
+    role="button"
+    aria-label={"FSRS Parameters"}
+    tabindex={unlocked ? -1 : 0}
+>
+    <textarea
+        bind:this={taRef}
+        value={stringValue}
+        on:blur={update}
+        class="w-100"
+        placeholder={tr.deckConfigPlaceholderParameters()}
+        disabled={!unlocked}
+    ></textarea>
+</div>
+
+<Warning warning={unlockEditWarning} className="alert-danger"></Warning>
 
 <style>
     textarea {
         resize: none;
         overflow-y: auto;
     }
+
+    textarea:disabled {
+        pointer-events: none;
+    }
 </style>
diff --git a/ts/routes/deck-options/ParamsInputRow.svelte b/ts/routes/deck-options/ParamsInputRow.svelte
index 864bc4fbc..07081ac49 100644
--- a/ts/routes/deck-options/ParamsInputRow.svelte
+++ b/ts/routes/deck-options/ParamsInputRow.svelte
@@ -10,11 +10,10 @@
 
     export let value: number[];
     export let defaultValue: number[];
-    export let defaults: number[];
 </script>
 
 <slot />
 <ConfigInput>
-    <ParamsInput bind:value {defaults} />
+    <ParamsInput bind:value />
     <RevertButton slot="revert" bind:value {defaultValue} />
 </ConfigInput>